The act of farting around others and trying to cover the fart noise with another noise such as coughing, clapping, banging on something, etc.
"Did that guy just ninja fart or was he really coughing that loud?"
"Jessica, you are such a ninja farter...we all know why you were really clapping."
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A master in the ways of gathering information. And does so in a way in which is secret and sly without anyone know you are gathering the pieces to the puzzle.
example "Coman is an information Ninja, how did he know about that for two weeks"
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The process of waiting for someone to log-on their computer/ Skype, so you receive the little Skype notice and can bounce on them for a Skype conference.
"Dude, I was totally waiting for you to log-on, so I could Ninja Skype your ass!"
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A mythical being who exists to give people wedgies. As with the Tooth Fairy, Santa Claus and the Easter Bunny, the Ass Ninja visits all the little boys and girls in order to bunch their underwear at the worst possible times.
"Dude I totally just got visited by the Ass Ninja! Cover me while I pick my underwear out of my butt."
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When you're messed up on an illeagle substance, more than likely an "upper", and you keep looking out the window out of paranoia.
"Dude, quit playing window ninja over there. Why can't you just get high with us and be chill?"
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The most elite, efficient class of stealth warcraft. Their existance is unknown to all but a select few. To become a sniper ninja, you must be able to shoot a mongolian's left testicle from 500feet awat while at the peak of an orgasm.
Person 1: "Holy FUCK dude, why did you just drop kick that baby!!??!?!"
Sniperninja: "Its O.K, I'm a sniper ninja."
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Also: Tom Cruise in 'The Last Samurai'
Did you see the Cruiser in that dumb movie? He was even smaller than the Japs. Looked like a Goddamn leprechaun ninja!
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