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."
#anal #bum #sex #bump #rump #booty #gay
by kiTTy♥ June 11, 2009
7 Words related to bump a rump
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