ur mom means ur mom lol yeah or like a stupid joke yeah
"do you know the time?"
"ur mom"
"you're an ass"
"that's what she said"
"istg"
MOST LIKLEY JUST A JOKE LMAO
someone: "hey, guess what?"
someone else: "what?"
someone: "ur mom.HAHAHAHAHAHHAHAHAHAHAHAHAHHAHAHAHAHAHAHAHAH"
the woman that birthed you and helped bring you into this world.
Kyle: Bro ur so ugly and annoying
Bob: Ur mom dude
person1: haha dude guess what?
person2: yeah?
person1: ur mom
person2: wow you're lame
person1: *crying*
A talk back that a tiny joke that can use any saying
Person 1: hey do u wan’t to eat with me
Person 2: no ur mom