fapkin

Crude internet-born slang meaning to masturbate, primarily used by guys in online spaces. 'Fap' is an onomatopoeic word that emerged from anime and internet communities in the early 2000s before spreading into mainstream internet slang. 'Fap it' is the verb form — telling someone to go do it, or describing the act. It's casual and crass, carrying no particular shame in the communities where it's used, though it remains distinctly informal and NSFW.

(vulgar, slang) To masturbate.

(internet slang) Deliberate abstention from masturbation.

(intransitive, slang) To masturbate.

(transitive, slang) To release tension by masturbation.