Please or to access all these features

AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

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

957 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:
namechangetheworld · 20/04/2026 20:40

In primary school, I regularly used to sneak into the cloakroom where the packed lunches were kept and steal chocolate bars from other kids boxes. Over thirty years ago now and I still have no idea why I did it.

I had a friend who ghosted me out of the blue and it completely devastated me as we were really close. She would literally blank me in the street. She was the first to buy a house and get married from our friendship group, and was always telling us how lucky she was that she had the perfect life. Sometimes if I'm having a bad day I go the long way home to look at her house. The fences have all collapsed, there are weeds everywhere, and there's a broken trampoline in the front garden. It's a complete shithole and it always cheers me up.

Calliopespa · 20/04/2026 20:39

Wallywobbles · 20/04/2026 20:37

DHs best friend had an affair 10 years ago. It’s just come to light. I’d imagine he thought it was beyond discovery. Nicely filed away. However it has bitten him squarely on the arse.

Its the length of time of the tarnish that we can never imagine in the moment I think.

I did so many stupid things between 14 & 24. My kids are astonishingly straight laced. Maybe it’s because they were born and raised outside the UK. And the fact that you are never free from permanent proof nowadays.

Or maybe they just haven't told you!

I only say that because mine are well behaved and then sometimes I think "Oh wait ..."

Crushed23 · 20/04/2026 20:37

I was a complete bitch all through my 20s. I was completely corroded with bitterness / anger / envy and took it out on others.

It was a result of unresolved trauma but that was absolutely no excuse.

Calliopespa · 20/04/2026 20:37

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?

Aren't you kind of repeating it again with this thread?

Charmatt · 20/04/2026 20:37

When we sold our first house, a man bought it who was going to rent it out. He didn't have anyone lined up to rent it but at the last minute there was a delay because the woman selling her house to us couldn't move out without her daughter's help and she,was called away with work. She asked to delay for a week after exchanging contracts for completion.
We said we could do that but the man buying our house said he would only do it if we knocked a thousand pounds off (he was paying £60k, 25 years ago) for one week's delay.
We decided to move in with my Mum for a week instead and put everything we owned in her garage.

....as we left my DH drove the van away. I locked up and dropped the keys at the estate agent. They were really good friends with him (they did a lot of business with him), so I asked if they needed anything else from me. They said, 'No'.

So I didn't give them the alarm code and he had to pay to have it reset. He asked us to pay for it but our solicitor told him to jog on.

Wallywobbles · 20/04/2026 20:37

DHs best friend had an affair 10 years ago. It’s just come to light. I’d imagine he thought it was beyond discovery. Nicely filed away. However it has bitten him squarely on the arse.

Its the length of time of the tarnish that we can never imagine in the moment I think.

I did so many stupid things between 14 & 24. My kids are astonishingly straight laced. Maybe it’s because they were born and raised outside the UK. And the fact that you are never free from permanent proof nowadays.

Incognitooooo · 20/04/2026 20:36

This is something that plays on my mind still all these years later and my absolute biggest regret .

I was young - 18/19 . I had a friend who at the time was my best friend. I met another group of friends and introduced her to them and in that group was a boy I had a crush on and she ended up getting together with him ( I never told her I had a crush , so she did absolutely nothing wrong. ) she lost her virginity to him , was very much in love. I ended up cheating with him. He pursued me , I should have been a good friend and avoided him and told her, but I was selfish and I convinced myself that we were some kind of love story - it was quite common knowledge amongst the friendship group and we would sneak off together loads. Everyone in the group saw her as moody - realisticly , she was shy. I did nothing to change the view . We didn’t have sex , but we did everything else.

I drifted away from the group for a while and I went and had a relationship and child and a few years later when my relationship ended , I began speaking to the group again and he contacted me immediately- this time , they were split up ( as far as I knew , his friends told me ) I then slept with him a few times and it tapered off. I then found out he had been seeing another girl too . A few years after that , she got in contact , she had had children with him and was still with him , I don’t think she knew . She seemed to be trying to catch up and re establish the friendship , then one day she just disappeared from fb - I think I was blocked . This point , I imagine she had found out. I saw her in the street once a few years after that and she completely blanked me. I don’t blame her. I should have been honest from the start , I shouldn’t have done it , I should have warned her. I imagine he’s cheated lots , I often wonder if they’re still together and what pain she has been through because of him and it genuinely does haunt me.

About 5 years ago my husband cheated , it was the worst pain I have ever experienced and it still affects me . I do believe it was karma .

Biggest regret of my life and I hate the person I was when I did it.

biggestcatmom · 20/04/2026 20:35

GrueyTwoey · 20/04/2026 18:17

Pissed in a pint glass abd threw it out of the window.
I was young, and drunk.

Just the piss or the whole glass?

tnorfotkcab · 20/04/2026 20:35

paulhollywoodshairgel · 20/04/2026 17:33

I had a horrible housemate. He had this mug that only he was allowed to use. I dipped it in the toilet, let it air dry and put it back in his cupboard. I’m my defense he was an awful person.

On a similar vein.... Had a flatmate who decided they would complain about every tiny thing. Left a mug on the drying rack? She'd come storming through and wave it about at me and go "WHY IS THIS OOOOUUUT??? PUT IT AWAY"... Was never mine, was always one of the other 2.

then she goes off on a huge long summer holiday,like six weeks or something, travelling round Europe.

She left a unwashed bowl of cereal and a mug of tea with a slurp at the bottom and a half eaten yoghurt on the kitchen table.

I put them all in her room, that she forgot to lock....and left them there during the summer. Something for her to come back to.

FleetwoodMcDonalds · 20/04/2026 20:34

To anyone over 50 - do you dwell on things you did in your teens, 20s and early 30s?

Asking because I'm 40 soon and exhausted from all the ruminating! 🙈

Finally grew up at age 35 when I had therapy about my messy childhood!

Loomis · 20/04/2026 20:31

Oh I also ghosted a friend I didn't like any more, in my twenties

And when I was a child me and my friend used to drop her hamster because we thought it was funny when it squeaked, that was AWFUL but we were really little, maybe only five at the most

shehardlysleeps · 20/04/2026 20:30

PracticalPolicy · 20/04/2026 20:29

So she was rude. Maybe you should have managed it better. Trying to ruin someone's life because you can't answer back or handle it like an adult is a terrible thing to do.

I’m really confused as to how I tried to “ruin her life”? I was venting on what I thought was an anonymous forum. I clearly had no intention of her knowing that I was posting.

OP posts:
zaramaison · 20/04/2026 20:30

I’ve been the “other woman” multiple times

PracticalPolicy · 20/04/2026 20:29

shehardlysleeps · 20/04/2026 20:27

It was nothing to do with her not doing what I want. It was things like I was quite quiet and reserved, and didn’t really drink. My family member who was a colleague of ours did drink a lot and would drink on nights out. One day I was talking to a colleague when she loudly (in front of the office) said “no wonder your family members drink so much She, it’s to deal with you!” and lots of other comments like that. I was in my twenties living at home and she was vile to me because of it, and got other people in the office to pile on me and be horrid to me.

I am completely and utterly ashamed of myself, but she wasn’t an innocent party.

So she was rude. Maybe you should have managed it better. Trying to ruin someone's life because you can't answer back or handle it like an adult is a terrible thing to do.

BrickBiscuit · 20/04/2026 20:28

I passed on a STI to two other people (before I discovered I had it).

Wiseplumant · 20/04/2026 20:28

ohyesido · 20/04/2026 19:23

You left a bird to die? How can you live with that

The spirit of this thread is for people to admit honestly, maybe for the first time the worst things they feel that they have done. The op already feels bad about it,so leave your judgement out, or leave the thread.

shehardlysleeps · 20/04/2026 20:27

PracticalPolicy · 20/04/2026 20:23

Good. Someone did something very similar to me two years ago and I was unfairly sacked. I did absolutely nothing wrong. I did get a good settlement but I still don't have a job.

People like you should be utterly ashamed of themselves. All because you can't handle someone not doing what you want. You should have raised it directly as a grievance.

Edited

It was nothing to do with her not doing what I want. It was things like I was quite quiet and reserved, and didn’t really drink. My family member who was a colleague of ours did drink a lot and would drink on nights out. One day I was talking to a colleague when she loudly (in front of the office) said “no wonder your family members drink so much She, it’s to deal with you!” and lots of other comments like that. I was in my twenties living at home and she was vile to me because of it, and got other people in the office to pile on me and be horrid to me.

I am completely and utterly ashamed of myself, but she wasn’t an innocent party.

OP posts:
ClairDeLaLune · 20/04/2026 20:27

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?

Blimey OP you have absolutely nothing to be ashamed of. You were venting, understandably, on what you thought was an anonymous forum, and you were very harshly treated by your employer afterwards. What she did in the first place was way worse than what you did. I hope you can find it in yourself to let it go and move on. Do not blame yourself, blame her. She’s a cunt.

Worst thing I did was ghost a childhood friend when in was in my 30s. I didn’t like her anymore and didn’t want to be friends anymore, and went about it the cowardly way. She was very persistent and kept calling and messaging and sending friend requests and I blanked her totally. I’ve felt bad for quite a while now.

Brightbluesomething · 20/04/2026 20:27

SurvivalInstinctsOfABakedPotato · 20/04/2026 20:21

I thought we'd all been there! I did this when we were having a new bathroom fitted and the workmen were upstairs and I was desperate! I grabbed my toddlers nappy and did it in a coat cupboard as I was too embarrassed to ask them if I could access the toilet then do a poo! I couldn't have gone to say a supermarket as I was desperate and hadn't been there long enough to ask neighbours!!

😂😂 That’s way more normal than I’d imagined.
Not ideal obviously but far less worrying.

Loomis · 20/04/2026 20:26

Why are so many of these "I did this bad thing but it was to a bad person" type confessions, they don't count?!

Me and my friends bullied a girl at school, looking back it was really awful but at the time it really and truly didn't occur to us that it was bullying, we just thought she was annoying and felt justified taking the piss out of her. I've felt guilty about it for years. We were really horrible to her.

Fernticket · 20/04/2026 20:25

@GravyMashMayonnaise . It was an accident, you didn't mean for that to happen. Sending hugs.
@SmellycatSmelllycat . You are a really good friend and the taxi driver deserved it!

Friedeggswelldoneplease · 20/04/2026 20:24

DreamyScroller · 20/04/2026 20:23

Yeah, she doesn't need you to say that, she's already saying it's the worst thing she's ever done.

Ok, fair enough

DreamyScroller · 20/04/2026 20:23

Friedeggswelldoneplease · 20/04/2026 18:49

So are you. That’s disgusting.

Yeah, she doesn't need you to say that, she's already saying it's the worst thing she's ever done.

BeenThere2Often · 20/04/2026 20:23

Jeesh- Just read your posting OP.
I’d be extraordinarily pissed off if that happened to me but zero shame on you. (I’d kick that feeling to the kerb immediately). The obnoxious colleague was the one in the wrong and if her bleating to management after being foul to you, and you offloaded elsewhere, she’s the one who should be looking back in shame. What a bitch.
Here’s some flowers. 🌷 🌹 🌺 Am on your side.

SurvivalInstinctsOfABakedPotato · 20/04/2026 20:23

CaptainMyCaptain · 20/04/2026 20:20

Gerbils often eat each other. It wasn't your fault.

Oh do they?! I've felt awful about that for years thinking about it's little scared paws trying to dig it's way out and I just put it in the wardrobe!

Swipe left for the next trending thread