1 definition by Big Pimpin69

Mastercating

The act of slapping a body part to sound like you are masterbating.

Guy 1: ( Clap Clap Clap Clap )
Guy 2: Dude what are u doing?!?!?
Guy 1: Dude it's okay im just mastercating!
Guy 2: Masterbating!?!?
Guy 1: No no Mastercating! Im just pretending to masterbate.

by Big Pimpin69 November 3, 2011