Ur Mum-a common comeback for when someone says....practically anything to you
Person 1:Hey Carl Whats up?
Person 2:Ur mum
Person A:I had spaghetti last night.
Person B:I had Ur mom last night.
Joe:Im so worn out from basketball..
Carl:Im worn out from Ur mom.
Person1:ur mum?
Person2: agreed.
a phrase you use when you have no good comebacks.
"you are an ugly ass"
"Ur mum"
ur mum is what people say when they don't want to say an actual answer.
I had passionate sex with ur mum last night.
Friend 1: What day is it?
Friend 2: ur mum