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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

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

683 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:
TheSecretAgent1 · 20/04/2026 21:08

I got drunk and let a married co-worker go down on me, his wife found out and left him

Ghosted a friend after she was really there for me when I was depressed

CreamFirstJamSecond · 20/04/2026 21:08

I need to be more poorly behaved. Clearly. I am still mortified that I threw up on DH 4 weeks into dating as I was very pissed.. (30 years ago)

Okiedokie123 · 20/04/2026 21:10

@KeeleyJ awful but karma! Epic genius “accident”

Britainisgreat · 20/04/2026 21:10

Funny one day as my 5 year old daughter piped up, right behind 2 HMV staff members "are we returning those videos you bought in Woolworths daddy?" Shhh...you'll get me shot.

katepilar · 20/04/2026 21:11

DevilsKitchen · 20/04/2026 20:03

I don’t know if it’s the “worst” thing I’ve done but when I was about 15 I broke a friend’s laptop. It was on the floor while a group of us were at his house, and I trod on it. I heard the screen crack and just ignored it. Later when he noticed, he asked if anyone knew anything about it and I said nothing. I still don’t know why I didn’t just say sorry and offer to replace it.

I think its because we are taugh/conditioned its safer not to confess.

RogueFemale · 20/04/2026 21:12

I didn't take proper care of two pet terrapins when I was about 9 or 10. They got sick and died. I still feel horrible about my neglect and the suffering I caused these two little creatures.

VeterinaryCareAssistant · 20/04/2026 21:14

cheekynamechang3 · 20/04/2026 19:49

This reminds me of some joke scratch cards my BIL bought. He gave them to some of the relatives at Christmas (e.g the other BIL) and some of their friends.

The scratch cards made it look like you'd won £250k or similar.

The BIL fell out with some of the people he gave these to.

I would be so upset to have received one of these. The instant feeling of finally some financial relief only to realise it was a cruel joke would have broken me.

tnorfotkcab · 20/04/2026 21:15

Calliopespa · 20/04/2026 21:02

Clever in the way that taking something that belongs to someone else is clever. It was really just theft with an extra step wasn't it?.

Ehhhhh more fool HMV for allowing returns without proof of purchase 🤷‍♀️

Britainisgreat · 20/04/2026 21:15

Aged 9 I hid my grandads glasses. He was as blind as a bat and was poking down the loo. "I know it's him" but of course my mum defended me They turned up after a week and never did admit it. He was a grumpy old twat, needing teaching a lesson. Spent 6 months with each of his kid's families.

Britainisgreat · 20/04/2026 21:17

tnorfotkcab · 20/04/2026 21:15

Ehhhhh more fool HMV for allowing returns without proof of purchase 🤷‍♀️

Spot on. Couldn't have cash but CD's or credit notes were fine by me. Had a disabled travel pass too so no tube fares.

ChilliWilly · 20/04/2026 21:17

Well

StartingFreshFor2026 · 20/04/2026 21:18

Ihateboris · 20/04/2026 20:51

The fact that you are trying to be a better person, means you are definitely not a monster 🌷

Although, what about "you shall not kill"??

Ilovr · 20/04/2026 21:19

I don't even have the courage to type mines. Actually feel suicidal on most days. Anyway, it is what it is..

Allseeingallknowing · 20/04/2026 21:19

VeterinaryCareAssistant · 20/04/2026 21:14

I would be so upset to have received one of these. The instant feeling of finally some financial relief only to realise it was a cruel joke would have broken me.

That was so mean and cruel. He must be twisted

skiprun · 20/04/2026 21:21

Absolutely nothing that has been said so far is remotely close to the worst thing I’ve done so I’m keeping 🤐

Purplebunnie · 20/04/2026 21:21

I used to treat boys quite badly, drop them after a week, never knew why I even went out with some of them in the first place. I also wasn't very nice in a couple of instances when I worked at a riding stables I was pretty mean to one girl and a bit arrogant and rude to other people. I wish I could go back and be nicer, I do fret about it quite a lot. Consequently I try very hard to be a nice person now.

Britainisgreat · 20/04/2026 21:24

Once was at my mum's and we went to Meadowhall shopping centre. Mum asked my daughter. Where's your dad gone? "Oh just to HMV to do another scam, won't be long...

HearMeSnore · 20/04/2026 21:25

Back in my 20’s I had a really good male friend. He looked after me when I had my heart broken and was always there for me when I needed someone - even when my misfortune was my own fault. I knew that he was hoping for more than friendship and honestly I had feelings for him too, but I resolutely kept him as “just a friend” because our cosy situation with no strings and no pressure suited me just fine. I think I assumed we’d end up together one day but wasn’t ready to commit. Meanwhile I shagged around with a string of randoms who meant nothing to me, just because I could, and I wasn’t remotely discreet about it. Eventually he pulled away from me and stopped calling, and I had the nerve to be hurt and angry…until I grew up a bit and examined my own behaviour. Nobody’s ever been kinder to me, and I’ll always hate myself for hurting him.

Cherryicecreamx · 20/04/2026 21:26

I think if that's the worse thing you've done, you're a pretty good person 😅
I feel like generally I was brought up okay so I'm not sure why when I got to teens/early 20s I seemed to lack morals! I think I went a bit wild being given a free reign and got carried away in the excitement of life. I'm not proud of some of the stuff I've done and it actually seems so opposite to who I am today.

Allseeingallknowing · 20/04/2026 21:26

thewonderfulmrswatson · 20/04/2026 20:43

When I was younger for a period of time I lived with my nanny. Irish & VERY religious. I absolutely despised going to church. So I hid her false teeth in the chest freezer when she'd gone to bed so we didn't have to go. She was frantically looking for them all over the house till I felt sorry for her because she couldn't eat her sunday dinner and I miraculously found them for her. Said they were in her pinny apron.
Oh I feel awful just typing it because she was an absolute diamond of a woman I just LOATHED going to church. She died in 2020 and I neber confessed what i'd done.

Know it’s wrong, but couldn’t help laughing at this!

Allseeingallknowing · 20/04/2026 21:27

skiprun · 20/04/2026 21:21

Absolutely nothing that has been said so far is remotely close to the worst thing I’ve done so I’m keeping 🤐

I won’t tell!

CakesAndCandles1 · 20/04/2026 21:27

Worked with a chap got on like a house on fire, I was late teens he was early 20’s. Funny chap who made work more fun.
His girlfriend was obsessed with ‘us’ constant harassment that we shouldn’t talk - he was my
manager so pretty difficult not to!. She’d ring me from his phone, get all our colleagues involved who were all young. Bar job type.

Everyone thought we’d slept together, I was getting all the backlash from doing it so in the end slept with him.

As one might say I was doing the time might as well do the crime.

The attraction might not have been so strong if she wasn’t so obsessive and pushy. Taught me a lesson about what sort of girlfriend I’d be in for future relationships.

CharleneElizabethBaltimore · 20/04/2026 21:28

its not my greatest moment and to be fair im the single one but i like to try to encourage people to have affairs not because of the chase, but more of how corruptible they would be and weather they would do it as a one off and regain their morals, or weather they get a taste and cheat regularly etc

ForDeftBeaker · 20/04/2026 21:29

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?

The worst thing I've done is stay quiet when I should have spoken up. Watched a friend get bullied. Didn't say anything. Was scared of becoming the target. Still haunts me. Your mistake was public. Mine was silent. Both shameful. Both forgivable.

Puffalicious · 20/04/2026 21:29

EineReiseDurchDieZeit · 20/04/2026 20:48

@Puffalicious Basically I ended it with someone I had just told that I loved because my ex came back on the scene and fucked with my head. He didn’t actually want me but didn’t want me finding someone else. I ended up with neither. It’s over 10 years ago and it still fucks me up. I get you.

Thank you. It's good to know others did it. 💔

I know they're both married &, I hope, happy.