Top Definition
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
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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