A silent killer that orriginated from japan. They are common to were black cloths and carry an assourtment of wepons.
by Conman27 May 05, 2010

1.(adj) Used to describe something that is so awesome it blows your mind. Comes from the fact that ninjas are well..ninja.
2.Can also be used as a characteristic to describe a person or thing.
2.Can also be used as a characteristic to describe a person or thing.
1. "Did you see those gangstas on scooters rockin there kickass skillz before??" "Yeah, it was so ninja!"
2. "That girl is so ninja for starting the use of the word ninja in many people's daily life.
3. Daybies think that's so endo when really it's not even ninja.
2. "That girl is so ninja for starting the use of the word ninja in many people's daily life.
3. Daybies think that's so endo when really it's not even ninja.
by Sniperx992 January 27, 2010

A method used to silently shit and piss on a girl's face (usually a whore) after a long night of having intercourse, ending with the person leaving unnoticed.
by mikeyurban July 27, 2018

by Ninjas Side Chick October 17, 2018

by Gdub's September 14, 2011

When you disappear behind a thick puff of smoke. Works better with a hookah; inhale the smoke and then slowly breathe out. Make sure to be standing near a place where you would hide yourself.
Ambrose - Okay guys, check it out! (creates a huge smokescreen and disappears behind the curtain)
Buds - WTF? This dude must be a fucking ninja!
Buds - WTF? This dude must be a fucking ninja!
by Ambrose Zeppo December 04, 2009

An alternative substitution for the term "nigga"
A nicer way for non black kids to use the term nigga without actually using it. Even though nigga is not a racist term, it can be misconstrued and possibly be offensive to some people. Ninja is a fly way to convey old to the new and may just save someone from an ass whippin'
A nicer way for non black kids to use the term nigga without actually using it. Even though nigga is not a racist term, it can be misconstrued and possibly be offensive to some people. Ninja is a fly way to convey old to the new and may just save someone from an ass whippin'
by stevey Staxwellhouse December 11, 2009
