a joke that 12-year-old boys use, and they think they're funny.
'ur mum'
nothing else, just ur mum
What you say when you have nothing to do when you get roasted.
Well, Guess what, UR MUM
the british way of saying the classical UR MOM joke so if u say ur mum GET OUTTA HERE
a very lame come back that only losers use to defend themselves in arguments that nikal uses