Fap Share definition Flag The sound Spider-Man makes when he's shooting his web all over a criminal. "Fap fap fap!!!!" "Haha, Dr. Octopus, that's the last time you'll try to use those faggoty limp dick metal protruberances on me, you fat fuck". Fap by Slick Dick Willie December 16, 2015 Get the Fap mug.