Ur mum not cool

It means ur mom not cool

Jimmmy hey Ron ur mum not cool
Ron No u
Jimmy fucking dies

by Nooblegend2769 May 7, 2020

Your mum

A good use word in a roast to defeat them

Your mum

Crowd ohhhh

by Miner mc March 5, 2018

Ur mum

A joke that nobody likes

For example Aiden: Ur mum
Everyone: nobody cares

by KaylaYT February 5, 2022

Ur mum

Insult which has no meaning inside ur bum if u want cocaine sex soz I can’t help u but I sell weed at www.childcaptivity.com so come get some pornos

Alex:ur mum

Ur mum: no ur mum! Cos ur mums dumb! Cos she didn’t know what I did to ur dad yet!!!

by Slnkythemadnman December 29, 2019

ur mum

a slang used as a joke.

"Who are you?"

"ur mum."

by caramel rice cake July 13, 2024

ur mum

is bri'ish

""ur mum is cool"

by yurii₊˚✩彡 October 17, 2022

Mum

A mum is often referred to a bitch

Wow your mum is a fat bitch

by Dexter01 June 28, 2020