Definitions by Martin Fitzgerald Finkle

fapplause 

(n) the clap-like sound one makes while masturbating to good porn.

the slapping, near-clap sound that is made by the hand slapping one's inner thigh while masturbating.

Fapplaud (v),

Pee-wee Herman's public fapplause was seen as innapropriate to most people.

fapplause by Martin Fitzgerald Finkle May 6, 2011