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Used when you want to say that you would masturbate to something. Usually used be geeks because they know that they have no chance of actually having sexual intercourse.
Geek 1: Check out this picture of Jessica Alba!

Geek 2: I'd fap that!
by painful's mom September 30, 2008
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Similar to "I'd tap that"
Used to indicate that you would fap to what you are talking about, acknowledging that you have no chance of getting with that person.
guy1: "damn, check that girl out."
guy2: "no way man, she's way outta your league."
guy1: "I know, but still I'd fap that."
by hi im stratton June 08, 2011
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