:ninja: 

master of the art of shifty-eyes

That :ninja: sure likes to look a round

:ninja: by RFC 1459 April 30, 2006

Ninja! 

to disperse a crowd of friends quickly hiding in dark corners and alleys

dude is that the cops??!! EVERYONE NINJA!!

Ninja! by quiet richard March 5, 2008

-ninja 

Used as a suffix attached to a noun to describe exceptional luck or skillz in a particular area.

Dude, I so CAN drive! I'm a damn car ninja!

-ninja by Kaji February 28, 2004

Ninja Pinch 

To steal something from somebody using stealth. Without anybody noticing the act...

I like that pen of John's. I'm totally going to (Ninja Pinch) it, when he puts it down.

Ninja Pinch by MbØt~Mk.II® March 13, 2015

Ninja Pooping

The art of layering the surface of toilet water with toilet paper to minimize the sound of splashing.

That's the last time I have Taco Bell for lunch at work. Now I'm going to have to do some ninja pooping.

Ninja Pooping by Extra Mayo January 27, 2013

Ninja Nude 

The act of fully undressing and taking a nude in a classroom, meeting, lecture or other busy event. Almost impossible to accomplish without getting caught.

James tried to take a Ninja Nude during the lecture for his girl and got his stupid ass caught!

Ninja Nude by UrbanDict is life July 13, 2016

Ninja Goblin

A phrase yelled by your sleeping boyfriend in the middle of the night before he slaps you around the face and lays back down in the bed.

Ninja Goblin!!!

Ninja Goblin by oogaflugen September 29, 2013