Top Definition
To do it up the bum. Aka anal sex.
P1: "Yo bro I totally hooked up with dat chick last night."
P2: "Awe man, you bump a rump?"
P1: "Straight up."
by kiTTy♥ June 11, 2009
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.