A game played in groups of people involving guessing the identity of a mysterious 'humper'.
The Humpee is blindfolded naked on the floor and the lights are turned out...
One person, chosen randomly and secretly by picking a colored straw, humps the victum... The victum must then try to guess who it was. If guessed correctly that person becomes the victum.
the act of keeping your hand stationed in a still circular pose around your cock while he thrusts his hips forward, providing the same hip motion as sexual intercourse.
Rod The Bod found he ejaculated quicker whilst humpsterbating