When a girl has a leg gap and a FUPA
"Have you seen that chick Sally? She has a leg fap."
by malcolmsex69 December 9, 2014
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A way prepubescent 12 year olds like to represent the act of fapping by slapping their hands against their legs, making a sound similar to fapping.
Man, did you see those pics of the Kardashians? *Leg faps*
(Friend shakes head repeatedly, because he knows his friend didn't actually see any pics)
by BillCosby=Senpai October 6, 2016
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