Top Definition
I gathered some facts about them:

Ninja don't sweat.

Bullets can't kill a ninja.

Ninja invented skateboarding

Only a ninja can kill a ninja. Regular humans are useless.

Ninja never wear headbands with the word "ninja" printed on them.

Ninja can breath underwater anytime they want.

Ninja can change clothes in less than 1 second.

Ninja don't smoke, but they do use smoke bombs.

Ninja always land on their feet. If they don't have feet they will land on their nubs.

Ninja invented the internet.

Ninja don't eat or drink very much, and they never have to go to the bathroom.

Ninja always move to America when making a new start as a non-assassin.

Ninja don't play sports. Unless killing is a sport.

Ninja can crush golfballs with 2 fingers, any two fingers.

Ninja have a bad temper when they lose at anything. They will usually cut off the winners head before they have time to gloat.

Ninja lie all the time. Even when the truth serves better, ninja will lie anyway.

Ninja swords are always straight with a square handle guard. Always. Curves are for girls.

Lack any personality

Wear headbands

Fight skillfully with any object

Can remove a spleen in one swift motion

Live in your house secretly for days

Can remove their shadow if needed

Hurl shurikens

Go anywhere they want instantly

Catch bullets in their teeth

Kill themselves if they make a noise

Can run 100 miles on their hands

Train 20 hours/day starting from age 2

Have cool words like Seppuku

Are masters of disguise

Can hover for hours

Flip out and kill everything

Are completely self-sufficient.

Split planks vertically with their nose

Can hide in incense smoke

Kill people.

Ninjas are the best guitar players. Ever.

Ninjas do NOT wear spandex.

A Samurai is NOT a ninja.

Dragon Ball Z characters are NOT ninjas.

If you see a ninja, he is NOT a ninja.
Some guy: "Ninjas are totally sweet"
Some other guy: "True true"
by sam paulin August 12, 2005
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?
by CPepe September 20, 2005
Very fast motorcycle produced by Kawasaki.
I have a Ninja 1100, it goes so fast it can rip off your eye lids.
by Joshua H May 26, 2006
Due to the fact we could not find any ninjas, we can not define them. We hope our apology is accepted. (But not by ninjas, for they never forgive, and they NEVER forget.)
That ninja is a great ninja, for we do not know what, who, or where it is.
by IfITellTheNinjasWillKillMe November 29, 2009
Ninja is a game in which two or more people must play. The game is played by slapping each other on the hand. You can only make one move per turn. Once an attempt at slapping the other person's hand is made, you must keep your body in that position until your next turn.
Person 1: Dude, my hand hurts from that Legit game of Ninja!

Person 2: Hella yeah it does, I pwned you in Ninja!
by Lavieta February 27, 2010
Facts (100% True):

-It only takes 1 ninja to screw 1,000,000,000,000 lightbulbs. and a similar amount of girls
-you can't see a ninja until it's too late
-ninjas can tell if a movie is good by looking at the cover
-The n word was a mispronunciation of ninja
-ninjas can beat mimes in the silence game
-a ninja always wins, otherwise they are not ninja
-ninjas don't touch the ground because it is afraid of ninjas
-infinity is just another term ninjas use to count their kills
-ninjas don't wear clothes, that is just their natural camoflauge
-ninja is the explanation for everything
-ninjas can swim on land
"Did you see that ninja-....?" (abrupt pause and silence).
by ~MR.D~ January 11, 2011
A universal replacement for any verb.
"Hey lets ninja us up a pizza"

"Your mom was all like, wanna ninja?"
by darrenism August 25, 2006
The single-handed most common ruiner of Erotic Stories
"I was having buttsecks but then Ninjas attacked. Bugger"
by Sir Jesus H Christ January 25, 2005

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