1 definition by ZenPsycho

Top Definition
A sound effect for masturbation used often in japanese comics. Popularized in the english speaking world by the webcomic www.sexylosers.com
The words "FAP FAP FAP" splashed across a comic panel in which mike is watching baywatch.
by ZenPsycho July 17, 2003
Mug icon
Buy a fap mug!