Masturbating before making any decision regarding females.
James: I can't tell if I should fuck my ex or not
Tom: Just fap on it, then you will know.
by Johng123 August 02, 2011
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The sound of a male masturbating.

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Look, some porn. I think I'll masturbate to it. *fap* *fap*
by HuntressPwns January 16, 2007
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The act of masturbating before making a tough/thoughtful decision.

A portmanteau of "fap" (slang term for masturbation) and the phrase "sleep on it" (think about something in the night and morning).
Mike: Should I ask Jennie out? She's really hot.
Jim: Fap-on-it man.
*an hour later*
Jim: So?
Mike: Nah, I like blondes.
by Deathinetly August 02, 2011
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Past tense of the word fap. Meaning to masturbate.
Hot chick: Wanna do me?
Geek: Nah, I just fapped it to your pic in last month's issue of Playboy.
by Noir November 11, 2006
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The onomatopoeic representation of masturbation. Often used to suggest that something is attractive.
Did you see those Natalie Portman pics? *fap fap fap*
by Anonymous L-Value October 11, 2002
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