Verb. To Masterbate with utmost stealthiness, similar to that of a ninja.
Spirited Away was such as shitty movie, I had to whip it out and ninjabate to pass the time.
by Narcism February 05, 2006
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To masturbate, fondle, or otherwise touch oneself sexually with one or more unaware person(s) in the vicinity.
"She was so hot in that movie, I just couldn't help but sit back and ninjabate."
by Kurrie December 01, 2007
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Noun

The act of masturbating in public or in front of someone without them noticing or getting caught.
I masturbated in the back seat of the car on the way to the movies....nobody noticed. That was some nice ninjabation.
by donkeygorilla October 31, 2011
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1. One who masterbates without anyone knowing.
2. One who masterbates & has never been caught in the act.
3. One who masterbates & no one has any idea they do so.
"Oh, don't worry about going into his room at any time, he's a ninjabator."
by Ejola October 14, 2012
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