Ur mum 

A nice woman that will make you cookies if your nice.

Person1:who makes good cookies

Person2:ur mum

Ur mum by Cookies12321 June 7, 2020

ur mum 

Someone British trying to roast you, but it doesn't sound good because they can't say ur mom.

British person: Ur mum is weird.
Me: Stop trying to roast my "mum".

ur mum by oh um okkk April 9, 2021

Ur mum 

You and ur mum and ur family will get chop up you dumb tranny faggot shit heads

Ur mums a fat slag and I will chop her up

Ur mum by English are trannys December 12, 2021

ur mum 

The way to answer anything or start an insult, it's even better if who you're talking to doesn't have a mom or their mom is dead.

mainstream kid: Hey what's your favorite fortnite skin?
me irl: ur mum xdddd

kid: M-my mom is dead.... *breaks into tears*
me irl: tHaTs HiLaRiOuS *does fortnite default dance*

ur mum by Walaba September 28, 2018

ur mum 

The most kiddish yet widely used insult ever.

"lmao i fukd ur mum"

ur mum by TheRothead December 24, 2016

Ur mum 

Ur mum is a common insult used for no apparent reason. This also references to Yo Mama jokes. This humor is weird and sometimes unlikable.

Ur mum is fat.

Ur mum by pigjacob June 27, 2018

ur mum 

heckin gay

ur mum is heckin gay

ur mum by xX_epicamer_Xx November 14, 2018