Top Definition
The ability to masturbate with either hand. Alternatively, the ability to switch hit in the five knuckle shuffle.
Guy 1: I burned my right hand pretty bad yesterday.
Guy 2: That sucks man, guess you won't be spanking it for a while.
Guy 1: Nah dude, I can still do it with my left hand. I'm ambifapstrous.
av Rhiever 27 juni 2009
The ability to masturbate with both hands.
"So, John, which arm do you use to fap?"
"Both, I'm ambifapstrous"
av Trevor89 4 augusti 2015

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