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The Collaborative International Dictionary
Fap

Fap \Fap\, a. Fuddled. [Obs.]
--Shak.

Douglas Harper's Etymology Dictionary
fap

"masturbate" (also the sound of it), slang, by 2001, echoic. Earlier, "drunk" (late 16c.). Related: Fapped; fapping.

Wiktionary
fap

Etymology 1

  1. (context obsolete English) drunk. Etymology 2

    interj. (context informal English) To indicate that someone (normally the speaker) is either masturbation, or inspire to by sexual arousal. n. 1 (context slang countable English) A session of masturbation. 2 (context slang uncountable rare English) pornography. v

  2. (context slang English) To masturbate.

Wikipedia
FAP

FAP may refer to:

Usage examples of "fap".

FAP and any other normal group would dismiss my witnessing upon first hearing.