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1.) an ass man; someone who digs the booty; a lover of posterior; someone afflicted with booty cooties

2.) someone who likes to go in through the out door; someone on a mission to uranus; etc.
bro #1: what's up with that dude? he's always with some fuckin' scary looking slampig with a hardcore butterface and shit.
bro #2: oh, he don't care about nothing above the waist, he's a rump junkie, yo.

sir mix-a-lot, marv albert, daryl hall, rocco siffredi, cosmo kramer
by dirtbike July 24, 2009
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