A dance in which you select a target, then dry hump them while smacking them violently with whatever appendage seems appropriate, at whatever degree you wish. A violent, and completely platonic dance.
Michelle is so bomb, I hump-smacked her last night.
Sam is a hump-smack CHAMP.
Megan? Shit dawg, Megan is like, the humpity-humpiest hump-smack dance devil aliveee.
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