Ur mom is often used as a joke when people say anything
Person a: ''What r u doing?'
Person b: 'Ur mom'
or \
whats on ur to-do list
ur mom
person 1: hey look, its ur mom!
person 2: who's your mom??
Person 1: A hot woman.
literally just something to say when you don’t feel like answering the question
“So how are you” “ur mom”
word that can be used as the ultimate comeback from you friends
*****DO NOT USE IF PERSON DOES NOW HAVE A MOM*****
Person 1 : hay what are you doing?
Person 2 : ur mom
Person 1 : hey wanna hang today??
Person 2 : cant i'm hanging with ur mom
Person 1 : hey your cute
Person 2 : ur moms cute
Person 1 : ur ugly
Person 2 : so is ur mom