Ninjas 

True ninjas cannot be found. Not even on urbandictionary.

Bob: "Hey have you seen any ninjas lately?"
Ray: "No, I don't believe in ninjas"

-Bob is secretly a ninja

Ninjas by wayfinderisaac October 4, 2012

ninjas 

A group (ninjas) or single person (ninja) that is trained in the martial arts. They are the coolest thing on the planet and live in competition with pirates.

Ninjas are so cool that I flipped out, kicked my mom in the face and crapped my pants all in one motion.

ninjas by MistahTom November 2, 2005

ninjas 

A non-word used by people who don't know that:
1. There are no plurals in Japanese and
2. Pluralizing Japanese nouns makes them sound like verbs.

Wrong: Ninjas are always fighting.

Right: There are about 8 ninja surrounding us.

ninjas by Zhaleskra March 12, 2007

ninjas 

A word used to avoid using the word nigga.

WTF are they doing, them ninjas is crazy!

ninjas by LittleDintheD April 6, 2007

ninjas 

Mammals who fight all the time and whose sole purpose in life is to flip out and kill people.

Natural predators with only one enemy in nature, namely Pirates.

"Holy crap, that ninja is sooo freaking sweet!"

ninjas by dragonxero February 25, 2005

Ninjas 

The single-handed most common ruiner of Erotic Stories

"I was having buttsecks but then Ninjas attacked. Bugger"

Ninjas by Sir Jesus H Christ January 25, 2005

ninjas 

plural for ninja.

ninjas by AYB April 2, 2003