Hump busted

hump busted is catching two or more people in the process of busting each other's humps. Having sex gay straight or masturbating in a public place. Preferably while yelling "you've been hump busted!" Then running away.

I can hear these two guys gruntin in the men's room stall over there. I think I'm gonna bust they humps, throw open the door and let em know they've been hump busted.
~South Philadelphia Collins