A fat one. One that openly displays a need to fornicate with another. Found commonly in North America with overweight women.
Not thinking out loud "oh damn, here comes a humpus, I gotta get outta here!".
by Brentus July 26, 2005
An anchent form of martial arts based on the tactic of thrusting your hips in a forward and reverse motion.
"Your humpu is far superior to my ninjitsu!"
by Aerion August 03, 2005