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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
 
204.
std such as aids/hiv or other terminal situation
hey, i heard your girl got that ninja!
by 19DJF74 May 12, 2008
 
205.
The nice way to say nigger!
that bitch is such a ninja, or my teacher is a fat ninja!
by nwyrkmets8 January 15, 2008
 
206.
Someone is a ninja if their dick is licenced as a lethal weapon.
Bob: "Dude! That guy just killed 9 people with his dick!"

Jim: "Yup, hes a ninja."
by The samm April 27, 2007
 
207.
n:
1.Derived from the Japanese words for person (nin) and temple(ja) respectively, "ninja" as a noun refers to the sweetest being in the universe. Purpose of the ninja is to flip out and kill people, but his time is equally spent mackin' on hot babes and wailing on guitars.

2.Ryu Hayabusa

a:The quality of being pumped-up or bearing resemblance to the actions of a ninja.

v:To perform ninja-like actions, such as cutting the head off of three guys at once.

Exclamation: Shout of surprise used when either
1: about to be assasinated by a ninja,
2: performing a ninja action
n1:Ninjas are totally sweet.

n2:Ninja Gaiden, I love that game! Oh, ninja...

a:Did you see that guy uppercut the kid through the window? That was ninja!

v:Oh man, Dante ninjaed those demons with that guitar!

exclamation:NINJA!!!!!!
by therone March 29, 2005
 
208.
Used when wanting to say niger. Ninja is used when wanting to replace the word niger in a sentence. Commonly used in a joking matter and not serios.
You see that ninja walk by?
by Yaseen.R June 12, 2008
 
209.
Meant to be used as an acronym - as in 'n'o 'i'ncome, 'n'o 'j'ob or 'a'ssets. Basically, a person who is a deadbeat, loser, dreg of society, waste of skin, useless, etc...
My older brother Derek follows the path of the ninja -- he's unemployed, smokes pot all day, and still lives at home with my parents.
by drunkenpetes October 25, 2007
 
210.
Another way of adding prestige to someone's skills. Used to convey respect. Used in conjunction with the name of the person's skill.
Guy1: That Satch concert last night rocked man!
Guy2: Ya, dood's a guitar ninja.
by King Mango September 25, 2006