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5.
Ninja were people of feudal japan trained in Ninpo or Ninjutsu. It was possible to use skills learned in assasination-which was done, but not coldly. Ninja's were japans peace keepers and information gathers-they would assasinate political powers that threatned peace of japan, and would often be recruited by a higher power (such as a warlord like Oda Nobunaga, or Ieyasu Tokugawa) to spy on enemy's and gather information. Ninja were originally called *Shinobi*, literally translating into a expert at information gathering. Ninja groups were divided into families and clans. The two regions were Ninjutsu developed and Ninja were founded were Iga and Koga provinces. there were roughly 53 subgroups of Koga and Iga. One of the most famous Ninja in history was Hattori Hanzo-a famous warlord and Ninja of Iga.
Random facts:
In 1676, the book Bansenshukai about Ninja methods was written by Fujibayashi Yasutake, a Samurai of Iga castle.
In 1681 the book Shoninki (correct Ninjutsu memories) was written by Fujibayashi Masatake.
In 1653 the book Ninpiden meaning secret teachings of Ninjutsu was written by Hattori Hanzo Yasunaga.
There were very few ninja-when oda nobunaga attacked Iga, 80 ninja fled.
Genbukan and Bujinkan are the only organizations keeping true Ninjutsu alive today.
Ninja didnt wear black very often-they wore deep red or dark green when on missions, and in winter snow, White.
Ninja were often Samurai too-afterall its only Title, not material.
Ninja didnt actually use straight swords much-only when they were desperate. After ninja had established themselves, they could use curved blades.
Other names used for ninja were Kancho, Shinobi, Kusa, Sppa, Rappa, Tsuppa, Mitsumoto(Kembun, Metsuke, Kaiken). Kyodan, Kanja, Choja, Shinobi no Mono, Onmitsu.
Ninja arent magical, they just understood sciences more advanced then the rest of the population of the time.
Ninja couldnt fly.
Ninja couldnt perform supernatural stunts.
Ninja can evade swords.
The Ninja stealthly entered his home.
by Ninpo-Bugei July 28, 2006
 
57.
Someone who has the ability to mindfuck others. Someone who is stealth enough to complete missions with other ninjas that involve high risk situations. A ninja can usually "ninja" information out of other individuals who are clear 'un-ninjas'.

Ninjas are usually dressed casually, and people don't usually peg these people as actual ninjas, but rather, ordinary and normal girls. Watch out though, there couldbe a ninja at your workplace.

And she could ninja the shit out of you.
co-worker: blah blah blah blah blah

ninja: (in her mind) - good to know I just ninja'd the shit outta you bud. I'm going to go tell my other ninja this classified information.
by ninjatwoxo July 21, 2011
 
58.
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
 
59.
An amazing game in which people must survive ninja karate chops in order to be the last ninja standing.

The rules are:
1. Extend one arm and place it in the middle with everyone else's arm.
2. On the count of 1, 2, 3, NINJA everyone jumps back (forming a circle) and strikes a ninja pose.
3. The game begins when a ninja decides to attempt to chop the hand of another ninja.
4. An attack attempt must only be made in one motion. Once that motion is made, the ninja must freeze is his new pose. Attacks can only be made to the ninja to the right or left.
5. Only attacking a ninja's hand will get him/her eliminated.
6. The ninja being attacked may dodge; however, that ninja must stay in his/her new ninja pose until he/she attacks or is attacked.
7. It is not necessary to attack every turn.
8. The last ninja standing is the ultimate ninja.
-Hey, do you wanna play ninja?
-No, I'm just not awesome enough for that game

-What happened while you were playing ninja?
-I accidentally had my hands by my sac, and let's just say the attacking ninja got handful.

amazing
slap
attack
freeze
by Champion Ninja March 14, 2010
 
60.
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
 
61.
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
 
62.
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
 
63.
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