or... (eeeek)

About
"Fap" is an onomatopoeic Internet slang term for the act of masturbation. The word is typically associated with men, while “Schlick” refers to female masturbation.

Origin
"Fap" is one of many onomatopoeic words often used in manga to depict the specific sound of a character masturbating. The earliest known transcription of the word "fap" online can be found in the Sexy Losers[1] webcomic titled "Video Girl Etchi" (shown below, left), published on April 28th, 1999. The comic parodied a scene from Video Girl Ai, a manga series written and illustrated by Masakazu Katsura and released between 1990 and 1993. On July 12th, 2011, Sexy Losers' artist Clay revealed in a post[8] on Tumblr that he was inspired by a Heartbroken Angels comic strip by Masahiko Kikuni depicting God masturbating when searching for a sound representing masturbation in his own strip.