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57.
A word used to describe something that is friggin' awesome.
Person 1: Did you watch that basketball game last night?

Person 2: Ya, omg, that move that that guy did was like, so ninja!!!

Persoon 1: IKR!!!!
by Mr. Hedgehog December 21, 2010
 
58.
1) Ninja (vt) To kick ass, synonems : own, kick ass, pwn, frindle. (past = ninjaed
2) Ninja (adj) awsome, badass, etc., only more so
3) Ninja (n) a) One who is ninja

b) one who ninjas people

c) An ancient Japanese assasin
Related - Pirate - one who is awseome, but not as awesome as a ninja.

- Pirate - One who is not at all awesome
1) Dude, I totally ninjaed him.
Ninjaed!

2) That dude is so ninja.

3) a) I am a ninja!

b) That ninja ninjatically ninjaed that pirate!

c) The ninja, objecting to being used as a verb, assasinated the users of this website.
by Draxis December 06, 2010
 
59.
A super awesome thing, object or action. First began to be used by Naomi in Australia after playing a reflex game.
You just got the high score in tetris! Oh My Gosh! Thats Totally Ninja!!
by Gigglz September 08, 2009
 
60.
v: to steal sneakily
n: an extraordinary force at something (usually athletic)
n2: an ancient Japanese spec-op
adj: to be as cool as a ninja
adv: to do something in a way that a ninja would do it
v: Yesterday I totally ninja'd this book from you, here you go.

n: Yeah, Richie's a ninja at dodgeball, he once vaulted Tommy to dodge an attack.

n2: Ninjas are cooler than pirates.

adj: OMG! This movie is freaking ninja! (Yes, I'm talking about Donnie Darko)

adv: Check this out! I can ninja laugh! *does not laugh*
by MG1992 September 01, 2009
 
61.
A business acronym for "Need Information, Not Just Advice."

An admonition to provide objective and fact-based data, not subjective opinions.
"Joe keeps telling Dave how American cars are so crappy and unreliable, really slamming them. So now, every time, Dave is like, NINJA, NINJA! Have some real facts ready, or shut up!"
by Ju1iet February 29, 2008
 
62.
This word is NOT a replacement for Nigga or a safe word for a whiteboy,Insane Clown Posse use this word as a term for a real ninja,a silent dealy assassin,they use the term in a song that is about what it would be like to be a ninja
Damn I wish I could be a ninja
by adproof July 26, 2006
 
63.
A phrase used in place of the word "nigga" It's a more fun way to talk to your bros without a white guy getting funny looks from black guys for saying nigga!
CJ: Wassup my ninja!
Darren: Wassuuuuup!!
by NastyDelicious May 27, 2014