somebody being very obnoxious and replying with two words.
Matthew: Hey what's up!
Francene: Ur Mom
A joke 12 year old ipad kids think is hilarious
Nick: what did you do last night?
Tyler: ur mom, ooohhh
Person 1: Watcha doing tonight?
Person 2: UR MOM
Person 3: get ROASTED MY DUDE
Person 4: Well uhhh…. UR MOM
Person 5: where are u heading after school?
Person 6: ur moms house
Person 5: Why?
Person 6: cause…ur mon