Ninja Library 

The quietest place on earth.

I'm really surprised at how things are at the Ninja Library, very quiet !

Ninja Library by izcool May 10, 2008

ninja turtles  

It is a group of 5 frineds Leonardo, Raphael, Michelangelo, Donatello and their sensei, Master Splinter and they spend their nights making fun of others behide their backs and they get a kick out of it.

I went out with the ninja turtles last night and they are still the same old people making fun of people it is just sad.

ninja turtles by Avery Manshake January 13, 2008

ninja swipe 

to discretely (like a ninja) tuck an erection under the waistband of underwear or belt line of pants.

a true ninja swipe is done in one swift motion.

yo, i was freeballing in my sweats when i got a boner- i had to ninja swipe that shit so it wouldn't look like i was proppin a tent

ninja swipe by princealberto July 7, 2009

Ninja Lag 

The warping of time and space so that a real event happens after it theoretically should

an example of ninja lag, in anime is when swordsmen or ninja slash their swords at each other, sometimes they have time to put their sword back into the sheath and walk away before the other person is actually cut by the blade.

Ninja Lag by Sweaty man in your 7th period September 15, 2009

Ninja Eyes

The act in which one uses the "Ninja Eye" to stealthy check out a female.

Only the masters know how to use the Ninja Eyes.

Ninja Eyes by blackbeltinninjaeyeism October 14, 2009

Ninja-Signing 

When an author secretly signs his/her own books in a bookstore without the bookstore's knowledge.

Brandon Sanderson is ninja-signing books in airports.

Ninja-Signing by jackatthekilns November 10, 2009

ninja turtleism 

a belief that the 4 ninja turtles are really the 4 horseman of the apocalypse

dude u goin to the ninja turtleism benefit tomorrow

ninja turtleism by marceld April 2, 2010