Define Piston Slap Meaning

Piston Slap

In a internal combustion engine when the cylinder is oversized and the piston will rock side to side producing a knocking sound.

Chad's car has really bad pistion slap

By Tallia

Piston Slap

The act of fuckin a loose hoe, whose pussy is so loose a man's crank will slap around in it.

When I was fuckin Cathy i suffered from piston slap.

By Alayne