Midhump is where someone is having sex and the guy is not all the way in when someone bust in the places and catches them. i.e friends or parents walking into a room while your having sex or a stranger or cop busting you in the back seat of a car.
Hey man, sorry about just walking in last night. Dude, you caught us midhump, you had better be sorry.
by hiddendemonfl August 10, 2007