Fixed Action Pattern. Produced by an innate releasing mechanism in response to an external sensory stimulus. A term used in biology.
Sound coming from teenager's room: "FAP, FAP, FAP, FAP" parents: "Little Tim's fascination with memorizing his biology is so commendable! Maybe we can help him."
by Canadianbiofreak April 15, 2014

by Chase Redden January 25, 2008

The sound that it makes when your balls hit your hand when masturbating. Or another name for the action of rough masturbating.
by Jerry Hsu number 2 October 25, 2007

by adriononyonib August 28, 2017

Ross says: yo what you do tonight
Smith says: meh i chilled with john and will, you?
Ross says: I think I broke my number of faps in one night
Smith says: wooooow, you have no life
Smith says: meh i chilled with john and will, you?
Ross says: I think I broke my number of faps in one night
Smith says: wooooow, you have no life
by GymClassCreaper May 8, 2009

the act of touching oneself, preferably on your roommates bed. can also be done at mealtimes in the bathroom if one cant wait to get back to the room
by fapper b November 2, 2010
