To be able to masturbate, 'fap', using both your left or right hand.
Person 1: It's so hard to choose whether to fap with my left or my right hand...
Person 2: You can use both???
Person 1: You can't?
Person 2: Dude, you're so lucky you're ambifaptrous.
by Lewicide September 15, 2009
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A person who masterbates with both their left and right hands and claim they have a girlfriend on discord
DAN: I'm Ambifaptrous.
Everyone else in the chat: GROSS DAN. Find a girlfriend geez.
by LoudCadmium July 19, 2021
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