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Share your dilemmas and get honest opinions from other Mumsnetters.

What’s the worst thing you’ve ever done?

788 replies

shehardlysleeps · 20/04/2026 17:18

I’m in a reflective mood, and it’s got me thinking about something I did a few years ago which is probably the thing I’m most deeply ashamed of.

There was a coworker who really rubbed me up the wrong way. I was very unhappy at the time, and going through an awful time personally. She would make snide comments about me, do things with my family members (who were colleagues too) which really got my back up, I felt like she judged me harshly and was pretty rude. Along with another colleague they made three or four very nasty comments which still stick with me.

Instead of raising a grievance, which I should have done, I took to posting about her on another website (along the lines of Mumsnet), not realising she used it too. She saw the posts and reported me, and I ended up facing a meeting with HR and a senior partner of the firm I was working in. It damaged my reputation within the firm forever and I ended up leaving after not being offered a promotion. I still feel ashamed of it now, nearly half a decade on, and feel like it’s tarred me forever.

Whats the worst thing you’ve ever done?

OP posts:
muddlemothermayhem · 21/04/2026 13:52

greyweek · 21/04/2026 13:39

I feel like this too. I regret many thoughtless things I said when younger, that would’ve hurt others’ feelings. I may be a much better person now, after years of reading, learning, reflecting, but I am paying the price in lost childhood/ potential friendships.
But if you’ve met my mum and older siblings you’d know why I was the way I was.

This is exactly how I feel too. I’ve put a lot of work into reflecting and trying to be a better person but know that my family never will.

Differentforgirls · 21/04/2026 13:55

Tredadt · 21/04/2026 04:58

My daughter graduated 2 years ago. She's shy and very quiet and she struggled to find a job. I' was worried about her and wanted her settled. In the meantime, I got her working in my admin team at work in a local authority via an agency. I manage the admin team though don't directly line manage them. Weird set up but worked out perfectly.

I knew that a new role was being created which is a higher grade than the admin officers in my team. I gave my daughter full access to restricted areas meant for senior management and trained her fully in my role and also in everything for the new role. I wrote the job description tailoring it to the tasks my daughter does and to her strengths. The admin team only knew about it 6m before it was signed off. They requested to see the JD but were refused.

I fobbed off any requests for training from the admin officers in my team only focussing on my daughter's development. Poor things, asked so many times, lol. The job was advertised and my daughter obviously got it..She is now a senior member of my team and we work alongside each other.

The job is pretty good and will probably set her up for life in a very nice department in a good field. When I retire, she will take on my work.

Jesus. The cheek of your “lol”.

AttentionPlease · 21/04/2026 13:55

Allseeingallknowing · 21/04/2026 13:50

That’s my opinion, obviously others will feel differently. Why post on this thread, which is about the worst thing you’ve ever done, if it’s not a bad thing?

Edited

i don’t know, as I’m not that poster. I assume she’s been brainwashed by patriarchal ideas about a woman’s morality residing in her vagina.

Nollie · 21/04/2026 13:57

greyweek · 21/04/2026 13:39

I feel like this too. I regret many thoughtless things I said when younger, that would’ve hurt others’ feelings. I may be a much better person now, after years of reading, learning, reflecting, but I am paying the price in lost childhood/ potential friendships.
But if you’ve met my mum and older siblings you’d know why I was the way I was.

You and me both x

UnctuousUnicorns · 21/04/2026 13:58

AttentionPlease · 21/04/2026 13:49

I misread the beginning of this as ‘I put bleach in my abusive ex’s eyes’ and was just about to be genuinely aghast after a thread of generally meek misdemeanours!

I’m sure he looked adorable in his mottled, stonewash-effect uniform.

I thought at first that the poster up thread put weedkiller ice cubes in her neighbours' drinks, presumably typing from her cell in HM Prison! 🤣

MyGirlJ · 21/04/2026 14:01

I repeatedly cheated on a boyfriend. We had 5 year relationship from when I was 17-22, and I cheated on him prolifically for the first 3 years. I really did love him, but I wasn't mature enough for such a serious relationship. He had suspicions but I would lie my way out of it. I realised the error of my ways and behaved myself for the last two years, but the relationship was tainted with suspicion and I eventually lost him. I've never forgiven myself for it and I've never cheated on anyone since.

muddlemothermayhem · 21/04/2026 14:03

Lots more occurring to me now. When I was young (teens/early 20s), I behaved really awfully in relationships when I felt jealous/insecure (which was often, as I grew up without really any maternal warmth or nurturing). On one level, I look back and think I must have looked a right twat, but also I try to have some empathy for the young woman I was, acting out because she just wanted to be loved. Not at all wanting to excuse my behaviour, just wanting to kind of give that young girl a hug because she was really hurting.

Verv · 21/04/2026 14:04

Worst thing that I dont care about happened nearly 30 years ago - Broke a womans cheekbone, nose and a couple of ribs.

Was a Saturday night at the pub and she was the local "hard as nails" who had an issue with me - at the time I had no idea why as I didnt know her/hadn't spoken to her and had only been living in the city for just over a month - literally had not a thing to do with her.

She walked up to me and spat in my face. I cleaned it off like WTF but didn't respond. A friend I was with helped me tidy up and said to ignore her because she was known for trying to start fights and if you respond she batters you.

Later the same evening my friends and I had moved out to the beer garden and she came up to me again and punched me in the face, and i still didnt do anything because higher ground turn the other cheek etc and people were watching.
As I was rubbing my face she hoiked and spat at me again.

I got the "red mist" and it all went a bit blank but as I came round I'd got her pinned by the throat over a picnic table and was punching her in the face and people were trying to pull me off and yelling - there was a fair bit of blood on both of us from her nose and mouth.

Somebody had called the police and I was arrested for assault but released without charge later that night when the landlord and head bartender went to the station and spoke to the police - told them about the earlier spitting incident, and that i responded to being assulted and wasnt the initial aggressor.

Found out later that she'd had to go to hospital and that I'd done some damage.

Also found out that her issue was me "humiliating" her best friend a couple of weeks beforehand. My sin was declining a drink "sent over" to me while I was working bar in a different pub.
I thought nothing of it because house rule was no alcohol while you're serving it so had retuened it to table with a thanks but no thanks im working.
Apparently this was akin to a major crime if you think you're a lesbian mobster.

I still think back to that sometimes because Im so calm and conflict avoidant. Worries me a little that when my temper blew I had no control or real memory of the moment, it was genuinely a red mist moment. Never had it again and hope i never will because it felt dangerous.

Worst thing that I DO care about and was a complete accident but i still feel terrible -
Postman knocked the front door while I was in the hallway, my dog is a bed "tosser" and had flung it also into the hallway and was sleeping in it - as I was stepping over the bed at speed, she simultaneously jumped up to go bark at the front door and my foot collided with her head - i kicked her square in the face.
I just remember THE HORROR.
She didnt make a sound but had this stunned look on her little face that will guilt me ever more, as will the sound of my foot colliding.
My only consolation was that I was wearing a croc which i hope softened things.

This was a over a year ago and I still apologise to her and feel absolutely rotten.

Differentforgirls · 21/04/2026 14:08

cheekynamechang3 · 21/04/2026 08:07

Out of all the posts I've read, this winds me up the most. Especially as you don't seem to feel bad about it.

I despise unfair work practices and have been victim to them myself. I hate it when crappy candidates get promoted to jobs they don't deserve.

I would never do this for my children. I would be up for getting them work experience at my place or swing a temp job for them, but nothing beyond that. Hopefully my children will be able to stand on their own two feet and get jobs they deserve and qualify for rather than be handed one by mummy.

Agree! Some of the others were due to circumstances and trauma. This was due to her daughter being inadequate and she bullied people out of a job. It’s disgusting actually.

Mangelwurzelfortea · 21/04/2026 14:08

I was 5 years old, on a school trip to Cotswold's Wildlife Park, and I tried to feed a pig with some of the pellets we'd been given. A pellet went straight down the pig's nostril and it squealed in fright/rage and I ran away. I never said anything to anyone but for years afterwards would go cold with horror at the thought of potentially having killed that pig. I realise now, over 40 years later, that it was quite unlikely that I did.

seagullsandbeachhuts · 21/04/2026 14:09

When I was 17/18, and still at school, I had a lovely boyfriend for about a year who I adored. However, within a few months of moving away to go to university I met somebody else at a party and decided I had to end things with my long-term boyfriend. He was due to visit me, but I told him I wanted to come home for the weekend instead. He kept asking me why, so I ended up telling him that I wanted to end our relationship because I had met someone else.He was absolutely distraught. Thirty-seven years later I still feel ashamed about how I behaved. My guilt at the time was only reinforced by my parents refusing to speak to me for months because of what I had done.

momtoboys · 21/04/2026 14:16

Elanol · 20/04/2026 17:56

I had a neighbour who slammed his front door. I jumped out of my skin every time. They are heavy fire doors and really loud. Sometimes the vibration ran across my floor.

I made numerous complaints to the management company but he didn't give a shit. Lockdown was awful, he was home all day and never went back to work. One day after 22 (yes 22 not a typo) slams I lost my shit.

I bought a huge pair of trainers in a charity shop so they looked worn. I put them outside my door. Suddenly he could close the door properly. Funny that....

It's a shame it took a threat of violence from the man who fits into those huge trainers to behave decently.

Well done!

momtoboys · 21/04/2026 14:17

I was involved in a long term affair.

ThatCyanCat · 21/04/2026 14:18

seagullsandbeachhuts · 21/04/2026 14:09

When I was 17/18, and still at school, I had a lovely boyfriend for about a year who I adored. However, within a few months of moving away to go to university I met somebody else at a party and decided I had to end things with my long-term boyfriend. He was due to visit me, but I told him I wanted to come home for the weekend instead. He kept asking me why, so I ended up telling him that I wanted to end our relationship because I had met someone else.He was absolutely distraught. Thirty-seven years later I still feel ashamed about how I behaved. My guilt at the time was only reinforced by my parents refusing to speak to me for months because of what I had done.

Because of what you'd done? Ended it with a boyfriend when you started uni?

Your parents made you think that was a terrible thing to do?

muddlemothermayhem · 21/04/2026 14:18

seagullsandbeachhuts · 21/04/2026 14:09

When I was 17/18, and still at school, I had a lovely boyfriend for about a year who I adored. However, within a few months of moving away to go to university I met somebody else at a party and decided I had to end things with my long-term boyfriend. He was due to visit me, but I told him I wanted to come home for the weekend instead. He kept asking me why, so I ended up telling him that I wanted to end our relationship because I had met someone else.He was absolutely distraught. Thirty-seven years later I still feel ashamed about how I behaved. My guilt at the time was only reinforced by my parents refusing to speak to me for months because of what I had done.

I don’t think you should feel ashamed about this - ultimately you told him the truth. And it’s absolutely not on for your parents to have refused to speak to you for months because of this, at the age of 18. I’m sorry that happened to you.

andthat · 21/04/2026 14:20

Temp2024 · 20/04/2026 19:40

I know this wasn’t intended to be an uplifting thread but this has been enormously helpful for me. I have spent my entire adulthood beating myself up for poor behaviour in the past (usually drink fuelled) to the point I have been very mentally low. I cut off every friendship because I was so ashamed of my behaviour and have spent adult life very lonely with no ties to earlier friendships.

It is very reassuring to read that other people have made mistakes and perhaps I can forgive myself.

I’m not sure what my worst thing is but I was very aggressive when I first started drinking at 18, behaved horrifically to parents and boyfriends. Made much more sense when I was diagnosed with ADHD as an adult and realised alcohol just wasn’t for me

@Temp2024 this is so sad to read!
Theres not a single person who hasn’t made a mistake!
Time to stop beating yourself up…let the past go, tomorrow is a new day.

UnctuousUnicorns · 21/04/2026 14:22

I think we've all been dumped, flung ourselves onto the bed, sobbed our hearts out, moped about for... a week or two, then picked ourselves up and got on with our lives. In fact imo dumping someone is doing them a favour, even if it doesn't seem like that at the time, as it frees them to be with someone who actually wants to be with them, or at least no longer wasting time in a no hope relationship that's going nowhere. A few months after my great "heartbreak" I met my now DH that I've been with for 31 years, married 28, so it all ended okay.

AttentionPlease · 21/04/2026 14:23

seagullsandbeachhuts · 21/04/2026 14:09

When I was 17/18, and still at school, I had a lovely boyfriend for about a year who I adored. However, within a few months of moving away to go to university I met somebody else at a party and decided I had to end things with my long-term boyfriend. He was due to visit me, but I told him I wanted to come home for the weekend instead. He kept asking me why, so I ended up telling him that I wanted to end our relationship because I had met someone else.He was absolutely distraught. Thirty-seven years later I still feel ashamed about how I behaved. My guilt at the time was only reinforced by my parents refusing to speak to me for months because of what I had done.

But you did absolutely nothing wrong! No one is obliged to stick with their teenage boyfriend for life, however lovely they are! You didn’t keep him hanging while you shagged your way though the entire population, and you were planning to do the decent thing and break up with him face to face on home turf until he forced your hand over the phone.

I think it’s your parents’ bizarre overreaction that has given you this hugely inflated sense of having done wrong when in fact you were blameless, even decent in how you approached ending things, @seagullsandbeachhuts.

ComfyKnickers · 21/04/2026 14:25

We had neighbours who had a huge amount of renovations to their house and garden done for over a year during lockdown. It was so noisy, including multiple deliveries before 7am with beeping lorries reversing, loud music playing, etc. When I went round once the site manager was arsy and aggressive with me. And as it was lockdown we were trying to work from home amidst all the noise, and it wasn't easy to just go out or go on holiday to get away from it all for a while. And of course the house owners were living elsewhere.

We moved not long after - we were thinking about moving anyway before all this.

I signed both of them up for a lot of embarrassing or irritating catalogues - religious information and surgical corsets, for example.

I wish I had thought of the weedkiller ice cubes on the lawn idea mentioned above. Or sneaking in at night and writing 'I'm a selfish prick' on the lawn in weedkiller. I toyed with the idea of buying some Japanese knotweed and chucking it over the fence, but sadly that's illegal.

IncognitoTime · 21/04/2026 14:26

Honestly, after reading this thread I'm not even willing to post what the worst things I've done are!

I spent many, many years in self-destruct mode as a result of childhood trauma (which isn't an excuse, but perhaps an explanation to myself to help me understand how I could behave in a way that feels unrecognisable to me now). All of the worst things I've done involve romantic/sexual relationships.

More recently, I joked with my friend about 'cursing' someone who was a cruel bully... he dropped dead that day (I'm unclear on the timings, to be fair, it might have been before that conversation!). I also have a DS who recently binned last year's Easter eggs that he hadn't eaten. Each time I'm in his bedroom and spot on of this year's spoils open, I have a little bit. I consider it to be doing my bit to reduce food waste 😁

MorangoDoNordeste · 21/04/2026 14:26

Keepgettingolder81 · 20/04/2026 17:41

I have been with my Husband, since I was 19, now 45 and I have a really good marriage.

In my 20s when I was pregnant, and a bit psychotic! We had a great big row and I dipped his toothbrush in the toilet! He is a right germophobe and even though I didn’t tell him at the time I was hugely smug with myself!

I did confess a few years ago, and he was absolutely horrified!! I don’t regret it though, I think it’s absolutely hilarious. My younger adult children looked at me like I was absolutely insane at the confession time.

But @Keepgettingolder81 didn't you ever snog your husband/share a drink/both use the same spoon to eat a dessert? In which case you would have been getting the toilet germs too!

Differentforgirls · 21/04/2026 14:28

CoffeeCantata · 21/04/2026 09:06

Oh God - shame on you. Of all the posts here, I agree that this is the most shocking and unforgiveable.

And absolutely no remorse from the perpetrator. Horrible, selfish, unprincipled, corrupt, self-serving...yes, I DO judge this pp.

So depressing. And the daughter knows that she didn't get where she is by her own merit or effort, but because Mum is a corrupt bad apple. How will that make her feel in the future?

There was one of these in my work. Everyone hated her. Then the mum got the boyfriend a job too. Everyone hated him. The mother retired. They both got demoted and are off sick now for 6 months of every year. Won’t be long until they’re sacked. Two useless people enabled by a mother who knew that they were both not that bright and very lazy.

Gizzywizzywoo · 21/04/2026 14:31

Nollie · 20/04/2026 17:26

Funnily enough, I've been thinking lately about some of the things I did when I was younger and they don't reflect very well on me at all. Ultimately I only have myself to blame but I do wish I had been given more attention and moral guidance when I was growing up.

Same here , i go over and over things i did when i was younger, silly situations i put myself in.wish my younger self had known what i know now

ComfyKnickers · 21/04/2026 14:32

Tredadt · 21/04/2026 04:58

My daughter graduated 2 years ago. She's shy and very quiet and she struggled to find a job. I' was worried about her and wanted her settled. In the meantime, I got her working in my admin team at work in a local authority via an agency. I manage the admin team though don't directly line manage them. Weird set up but worked out perfectly.

I knew that a new role was being created which is a higher grade than the admin officers in my team. I gave my daughter full access to restricted areas meant for senior management and trained her fully in my role and also in everything for the new role. I wrote the job description tailoring it to the tasks my daughter does and to her strengths. The admin team only knew about it 6m before it was signed off. They requested to see the JD but were refused.

I fobbed off any requests for training from the admin officers in my team only focussing on my daughter's development. Poor things, asked so many times, lol. The job was advertised and my daughter obviously got it..She is now a senior member of my team and we work alongside each other.

The job is pretty good and will probably set her up for life in a very nice department in a good field. When I retire, she will take on my work.

How utterly shameful.

And you think it's funny?

SerafinasGoose · 21/04/2026 14:41

I've never assaulted or abused anyone, so don't get to claim a 'worst' in that way. But my own personal worsts are things I'm so ashamed of that I have never talked about them before, other than in therapy. The most serious were either sins of omission, or issues stemming from screwed up boundaries and attachment style (some terrible things were done to me in childhood; I have cPTSD) which hurt others and ruined some of my earlier relationships.

Then I lost my mum - my anchor; I had an abusive father - to a highly aggressive brain cancer when I was in my 20s. She, I and my DB were all NC with my father. At that point I wasn't a child, but caring for a terminally ill patient was beyond my remit at that age and I quickly found myself (as the female child) the one with the bulk of the responsibility.

I didn't have time to fuck that up. She died within mere weeks of the first symptoms presenting themselves, and we were as close as a mother and daughter could be. Nothing was left unsaid and I'm not left with guilt about not loving her as much as I could whilst she was still alive. But after that happened - my aunt had died 18 months before and my maternal grandparents therefore outlived both their children - my grandfather developed dementia - unclocked by me at first as I was dealing with other things. He went quite literally off his head with grief. This was around 4 years before his actual death and whilst I did my best I'm not at all sure I supported him as well as I might have. I had bills to pay and other sick family members to care for.

In the interim, my grandmother already had MND when my mother was diagnosed, and went into a decline after her death. It really was the worst thing I've ever witnessed: such a cruel disease. By the end she was begging to die. She wanted me to help her. I think my mother might have (She died 6 months to the day before my grandmother) but I stalled. I'd never heard of Dignitas at that age, and couldn't have afforded it if I had. And I couldn't raise a hand against her to help her, even though I knew that was what she wanted. I was afraid of facing a murder charge. So I discovered something about myself that I never previously knew: that when the chips are down, I'm a coward.

I've lived with that knowledge ever since and never been able to dispel the guilt.

It's been 23 years.

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