noun: (professional wrestling) A move in which the wrestler applies a front waist lock, then drives the opponent's head into the mat by falling to his knees or backside.
noun: (soccer) a very hard shot.
noun: Alternative spelling of pile driver (mechanical device) [A machine for forcing a pile, a long beam, into the ground as part of the construction of a foundation; usually by raising a weight and then dropping it on the beam.]
