one who masturbates in public without being cought and leave no trace of evidence
tom: why is my chair so sticky

Jerry: damn fap ninja!
by smurf herder 69 September 20, 2011
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A Fap Ninja is someone who can masturbate on several occasions without ever getting caught.
Person One: "Whoa bro, I didn't even get caught, again!"
Person Two: "Whoa man, you're a real Fap Ninja!"
by Shadowwolf97 October 30, 2014
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A Fap Ninja is someone who can masturbate on several occasions without ever getting caught.
Person One: "Whoa bro, I didn't even get caught, again!"
Person Two: "Whoa man, you're a real Fap Ninja!"
by Shadowwolf97 October 30, 2014
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The art of masturbating in a high/semi-high traffic area in your home or in a public area without anyone catching you or being suspicious of anything.
All of a sudden I got really aroused in a public place so I had to ninja fap
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Its when you secretly beat off for someone else to find later.
"Every morning I ninja fap in the shower. And my dad thinks thats soap between his toes."
by dave_dew January 19, 2007
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When ninjas are fapping to you while you're asleep. (Mostly on "No Nut November")
Jake: I got ninja fapped yesterday
Johny: damn you Ninja Fapping
by CoolDude137 October 14, 2018
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