the definition for ninja can not be found. we are not sorry for the inconvenience.
no ninjas here
by west&carver November 27, 2010

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To insidiously and calculatedly disseminate massive quantities of misinformation in order to completely obscure and divert attention from the real meaning of something nefarious.

Hack.
The real ninjas ninja'd the popular websites and online dictionaries with bogus information about ninjas. By doing this, they diverted attention from the cryptic underground hacking book about ninjas entitled "Real Ultimate Power."
by ham-man July 10, 2008

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What was once a proud feudal Japanese assassin renowned for its ninjutsu skills and martial arts/weapons training now reduced to American five-year olds reenacting what they see on Naruto and getting injured for it. Ninjas formerly trained in clans or legions. Now they go to school in an academy to better relate to American children. Weaksauce =(
I'm gonna be a NINJA! Believe it! Watch this, mom! It's not dangerous, I saw it on Naruto!!!
by mechademon5 February 25, 2008

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1.
Noun;

a highly skilled assassin. It is widely accepted that ninjas are capable of literally melting into surfaces where the shadow is sufficient.
It is generally uncontested that a ninja is fully capable of killing you in the center of a social event without being seen, heard, or witnessed in any way by your senses. Hell, he'll probably be gone before you hit the damn floor.

2.
Adjective; to describe an act of extreme skill or stealth.

2.
Verb; an act of extreme skill or stealth. Usually used as a hyperbole, because nobody knows exactly how a ninja works, as normal people have yet to see it in action.
1.
"Wanna watch Naruto with me? He's a really cool ninja."
"No, no, you got it wrong. Naturo is a pussy, not a ninja."

2.
"Gentlemen! We just seized an airfield.
...That was pretty fucking ninja."

3.
"I just totally ninja'd that fool!"
"I concur. Ninja'd that fool you did."
by Pencil Vania April 27, 2010

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crazy ass mother fucker blackbelt who can whoop your butt without you even knowing they are there. Crazy skilled, stealthy, never seen. usually teens and mid 30s. Quick moving and very effective.
We are some of the most nastiest ninjas in the world.
by ray-cait-whatev April 03, 2010

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Ninjas In Need, Just Ask Foundation.

The fundraising branch of the Secret Ninja Society. You probably haven't heard of it, it's that secret.
I just got a call from some guy collecting donations for the N.I.N.J.A. Foundation. I totally gave them 3 bucks. Now I get to display a ninja star on my bumper to show everyone I donated!
by kurticus May 21, 2007

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a free runner who is so sick he could just be a descendent of a ninja,
a person who is amazing and sneaks outa no where
the guy who always wins in hide and seek
but is never found
DUUUDE did u just see that guy, i swear to god hes a frikin ninja
dude i hate john he always wins hide and seek AND HE DOESNT EVEN COME OUT WHEN WE YELL GAMES OVER
damn that guys so ninja he drinks salt
outa a sippy cup
by KIZzla February 20, 2009

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