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
ur mum is often used by a British person. Also is often used as A JOKE or a INSULT
person 1: what time is it ?
person two: time to fuck ur mum
person 1: ur clapped
person 2: I was making clapping noises with ur mum last night shut up fam
Ur Mum is a person that is usually really hot or really fat ( in American jokes ) spelling it in an American way ( Ur MOM ) is unacceptable.
Omg! That persons standards are so high they could date Ur Mum!