When someone "humps" a pinball machine in an attempt to nudge the ball in a certain direction, or to dislodge the ball out of a stuck position. The player humps with the pelvis because his or her hands are too busy
simultaneously smacking
the flipper buttons.
Sometimes pinball rape is performed as an ill-advised mating ritual display. A "tilt" can happen, causing
the machine and all human on-lookers to shut down completely.