This is a newly created meaning of the popular male masterbating sound effect. This definition is more of an acronym meaning "Fat Pussy". FA= fat, P= pussy.
Guy1: "Woah! Lela Star has a real fap."
Guy2: "Yeah, she named it Fatcat.
Guy1: "Well it is a fat puss.
Guy2: "Yeah, she named it Fatcat.
Guy1: "Well it is a fat puss.
by Finncity95 October 04, 2011