ur mum

The apparent zenith of comebacks, used almost exclusively by 12-16 year olds.

Person 1: You sir, are a veritable nincompoop.
Person 2: ERR UR MUM LOL!1!

'I AD SEX WIV UR MUM LOL'

by Dougal September 27, 2004

ur mum

the british form of "ur mom", a overused comeback that is funny if used as a joke or your kidding when u say it.

Person:Fuck U!
British Person: I fucked ur mum!

b_i_t_c_h678: i have sooo much homework.
this1person923: ur mom has so much homework! OH! BURN! WAT NOW!?!?!?!
b_i_t_c_h678: wtf lol

by The girl who wants to have Ryan Rosses babies July 16, 2006

ur mum

"ur mum" is not ur actualy ur mum but a person that represents ur mum
it is used when you are really stoned or dont hav a good enough come back

Jon: what does my cooking taste like?
Michael: ur mum

by Germans December 12, 2006

ur mum

a phrase used by someone who has no desent come back or is just a bit of a retard

A: what you doin tonight?

B: ur mum!

by Harry Woodcock January 18, 2008

ur mum

when ur british friend tries to roast you

when u insult your british friend they will most likely say this to you they will say "I know ur mum is tho."

by lizzie.io December 20, 2019

Ur Mum

The thing that a retard says after u say something like “What did you do today?” Then he answers “Ur Mum”

“What’s ur hobby?”

“Ur Mum”

*Slaps him*

by Shivi Wivy January 30, 2019

ur mum

a term used to describe when you have no other comebacks to say or referring to morgz mum who is too amazing for this world but at the same time bald martin is better than her

you're an idiot. ur mum. OHHHHHHHH

by Alana Cirbila April 17, 2020