Oooooh I have so many things that piss me off. Hope you have 10 minutes...
'You sound unhinged'
Horrible thing to say. A poster who says that to someone is basically saying 'you're a nutter,' and 'you are deranged/mentally ill.'
When someone is passionate about their views and expresses them in a forthright manner, it pisses me off when someone says 'You sound angry.' It is so fucking patronising. The poster is basically saying 'there there luv, no need to be hysterical, calm down dear......'
On every thread where a woman comes on and says 'I am 44 and pregnant WWYD???' ... a bunch of posters come on saying 2 out of 3 women they know had a baby at 47, 48, 50, 53, natural conception of course, and a perfectly healthy baby with no health issues whatsover. And if someone says they don't know any women who had a baby over 45, they are told 'you are clearly not a middle class professional then and must be a chav from a rough sink estate in Manchester, cuz every middle class professional I know had their first baby at 45 to 55 y.o... Only chavs have them before 40.' Oh and they know DOZENS of women who had 2 kids at 45-50, who are 70-75 now, and run a marathon every month, scale Mount Everest twice a year, do kickboxing and karate, look 39, and don't have a SINGLE health issue.
Ddog, Dcat, DNephew, DNiece, WhattheactualDFUCK?! 
'WOW just WOW' makes me feel violent.
Women who are incensed that other woman do not use mooncups.
Women who are incensed that other women change their surname to their husband's surname with 'and why exactly did you change your SURNAME? Why didn't HE change HIS? 
'Pull up your big girl pants.'
'I just spat my tea all over my keyboard' (usually in response to another poster saying something rude or sarcastic to another poster that they think is funny.) And we know they didn't actually spit their tea over the keyboard!... 
Oh and I hate it when someone says 'there are a few new posters on this thread putting their views across... WE SEE YOU!' Fucking HATE that. 
LO for a child. Just say CHILD!
NAICE ham, NAICE neighbourhood, NAICE hotel. Fuck off, say NICE. You sound like a twat.
NC for this but penis beaker, naice ham, cancel the cheque yada yada.. 
'Give your head a wobble.'
(WTF?!) Such a horrid saying.
'Why did you have children with this man if he is so awful?'
When someone is struggling financially ... 'take in some ironing,' or 'get a little cleaning job' or 'do a job from home - sticking glitter to plastic champagne flutes...'
Agree with the poster a few pages back saying that some MN-ers never age, and are all a size 6. I PMSL sometimes at some threads where women aged 46 claim that they are CONSTANTLY asked for ID to buy alcohol. Yeeeah, in your dreams luv!
Nobody, and I mean NOBODY looks more than 10 years younger than their age - not when you look at them properly...
Posters on here who are 30, and claim they bought their first home at 19, and are now mortgage free 'purely through hard work and saving...'
Posters who insist they cook everything from scratch, and are superior to people who don't.
LTB at the slightest little thing. Like it's SO fucking easy to just pack your life up into 2 suitcases, find somewhere else to live, and start over!
Ahhhh that feels better. 