When an unfamiliar guy (a.k.a. "
chump") comes up behind a woman on the dance
floor and starts
grinding away on her behind, waving to his buddies, getting off on the fact that he'd never be able to get this close otherwise...
"Lisa, I gotta get off this dance
floor - there's this guy that's been
chump-humpin' on me all
night and he's creepin' me out!!"