What is Ur Momma?
1.
when you want to diss someone with no better comeback, or a corny comeback
Dude, jus quit baseball, u can't hit for ur life if it depended on you.
Yea, well, ur momma can't hit for her life if it depended on her.
See
2.
ur momma
Mr. White: UR MOMMA!
See
Random Words:
1.
an alternative way of saying OMG except its COOLER AND DIFFERENTER. generally an exclamation of surprise or anger. shortened as OSB
Guy..