Slang for masturbation that comes from the sound of masturbation

• "Very sexy!" (hidden in HALF A POUND)
• "Ooh la la!" (hidden in HALF A POUND)

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"masturbate" (also the sound of it), slang, by 2001, echoic. Earlier, "drunk" (late 16c.). Related: Fapped ; fapping .

Wikipedia Word definitions in Wikipedia
FAP may refer to:

Wiktionary Word definitions in Wiktionary
Etymology 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. ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Fap \Fap\, a. Fuddled. [Obs.] --Shak.