A silent killer that orriginated from japan. They are common to were black cloths and carry an assourtment of wepons.
by Conman27 May 5, 2010

Fuck you kid. you're adopted
THE FUCK YOU JUST SAY TO ME YOU LITTLE SHIT?!
EHEHEHEHEHHEHAHAHAH HOW ARE YOU-HOW ARE YOU NOT IN FUCKIN SCHOOL?!
DIE. IN A FUCKING FIRE PLEASE.
WOW LOOK AT ALL THESE FUCKIN CUNT LORDS MAN
THE FUCK YOU JUST SAY TO ME YOU LITTLE SHIT?!
EHEHEHEHEHHEHAHAHAH HOW ARE YOU-HOW ARE YOU NOT IN FUCKIN SCHOOL?!
DIE. IN A FUCKING FIRE PLEASE.
WOW LOOK AT ALL THESE FUCKIN CUNT LORDS MAN
ninja: n word
by Baznigger April 25, 2019

The art of dissapearing from a room or area with people, without any of them noticeing. it is very awesome, and hard to learn. they are great at partys, and it makes a terrific exit. *very similar to "pulling a batman".
GUY #1: so, dude, have u like, seen tony around here? I beat him in a chugging contest.
GUY #2: yeah, but he must have left.
GUY #1: no way, i had every exit covered. the dude owes me 5 bucks!
GUY #2: dude! do u know what happened?? the dude must've pulled a ninja on you!
GUY #1: what i jerk. but you've gotta admit, its pretty cool.
GUY #2: yeah, but he must have left.
GUY #1: no way, i had every exit covered. the dude owes me 5 bucks!
GUY #2: dude! do u know what happened?? the dude must've pulled a ninja on you!
GUY #1: what i jerk. but you've gotta admit, its pretty cool.
by Quantum Kestrel December 29, 2011

by dadlyman November 21, 2011

by thisisnotnina June 8, 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 4, 2009

Dood 1: "Dood, did you see Bob jack that old lady's purse?"
Dood 2: "Yeah, dood, Bob is sooo ninja."
"Dude. Next time, try to be ninja when you steal a cookie from the cookie jar. Jeez.."
Dood 2: "Yeah, dood, Bob is sooo ninja."
"Dude. Next time, try to be ninja when you steal a cookie from the cookie jar. Jeez.."
by MJ is cool. August 7, 2009
