Ninja 

n. pl. ninja or nin·jas or nin·jaed

One who takes loot before a group has made their decision. Typically greedy players and should not be trusted.

OMGWTF, someone just ninjaed Destiny in our UBRS raid!

Ninja by Tsurani September 4, 2005

Ninja 

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."

Ninja by Pencil Vania April 27, 2010

Ninja 

Ancient Japanese warrior, well trained in the art of stealth. Some tools of the trade include shuriken, swords, daggers, and knives. Ninja were part of a clan.

"This isn't Teenage Mutant Ninja Turtles!"

Ninja by Mad Walrus April 30, 2006

ninja 

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

ninja by KIZzla February 20, 2009

ninja 

Very fast motorcycle produced by Kawasaki.

I have a Ninja 1100, it goes so fast it can rip off your eye lids.

ninja by Joshua H May 30, 2006

ninja 

v. the act of stealing, swooping, or snaking something. usually the person who has been ninja'd upon does not realize it for a little while, and then they are mad when they find out that something of theirs has been ninja'd.

Hey man you ninja'd my chair. Why the hell did you ninja my book, Jordan?

ninja by CPepe October 3, 2005

Ninja 

Ninja has no definition as Ninja cannot be defined

OMG a Ninja*decap*

Ninja by The only real ninja here March 1, 2010