ninja 

adj. something extremely badass (often in a stealthy way)

Dave: You stole your dad's car and had sex with your girlfriend in the backseat and made it home before he woke up for work the next morning?! Dude, that is totally ninja!

ninja by fauxamis March 23, 2007

Corn Ninja 

a person who resides in the mid-west (or more specifically nebraska) who looks, acts, and thinks like a sister fucking hillbilly.

man dawg, i gotta get outta this club before all these corn ninja's start breaking out into the electric slide

Corn Ninja by danbrown June 29, 2006

Killing a Ninja 

A slang term for Masturabtion.

Jon: "Why were you in the bathroom so long?"

Dean: "Sorry, I was killing a ninja."

Killing a Ninja by Pygmie September 15, 2006

ninja turtle

To clarify, there is a teenage mutant ninja turtle - a children's cartoon, and then there's "the ninja turtle". The ninja turtle is the act of taking your ballsack testicles included and flipping it around so that it sits on top of your johnson. It's best achieved on a warm day when things are hanging lose. The term originated at the University of MD fraternity scene. The ballsack resembles a turtle shell and the johnson is the turtle's head peeking out.

Jim was so drunk that he pulled down his pants and demonstrated the ninja turtle in an attempt to get Cindy's attention. But he failed miserably and went home and pulled his pud instead.

ninja turtle by Joe K from MD May 5, 2007

Ginger Ninja 

A person (normally a girl) who has ginger hair, known for being good at sex and very tight.

Ginger girl (ginger ninja)

Ginger Ninja by GINGER NINJER March 11, 2011

ninja 

v. To pwn someone in a stealthy way or by surprise

I was playing a game of GoW and it was only me and this other kid left so I creeped up behind him and ninja'd him with my shotgun, He never saw me coming.

ninja by Keithian I. April 7, 2007

Ninja Cow 

An asshole and bastard. Many have tried to combine the two and create the "Basshole", but that is simply silly.

You are such a Ninja Cow, Nova!

Ninja Cow by Ninja Cow June 20, 2004