Basement Ninja 

A person(usually a teenager) who rarely sees the light of day and spends his time playing videogames ranging from: Modern Warfare 2 to World of Warcraft.

Me: Dude, I was enjoying a casual game of Modern Warfare 2 when this 10th Prestige dropped into my game and fucked everyone up.
Friend: What a fuckin Basement Ninja.

Basement Ninja by KillerKore13 December 12, 2009

Coffee ninja 

(n) One who secretly steals the first cup of coffee from a fresh pot, even though he wasn't the one who made it, thereby circumventing the "first dibs" rule granted to he who made said pot of coffee.

Damn coffee ninja! I just made that pot and I was really looking forward to having the first cup!

Coffee ninja by Handsom Rob aka Big Poppa April 10, 2010

Photo Ninja 

A person who tries to blend into the background and takes lots of pictures of a group of people/ one person. This person usually takes pictures of celebrities or cosplayers.

cosplayer 1: We are being photo ninja'ed again...

cosplayer 2: I wish they would just ask us to pose for a picture cause we will

cosplayer 3: Should we smile at them or flip them off...

Photo Ninja by hetaliaftw! July 25, 2010

Fag Ninja

Someone claiming to be a Ninja who clearly has no ninja-like qualities, is well versed in deepthroating and has mad rookie status. Generally also extrodinary cockblockers
Daz is a hell fag ninja. He's the leader of FNC (Fag Ninja Clan)

Daz is a hell fag ninja. He's the leader of FNC (Fag Ninja Clan)

Fag Ninja by King LJ August 20, 2007

Uber Ninja

to cool for this site

Uber Ninja!

Uber Ninja by Uber Ninja September 24, 2003

akisu ninja 

n. 1. A master of the martial art of akisu.
2. One who repairs computer hardware or software as though it were a martial art form.
3. A hacker.
4. Probably also an actual ninja who acts as a "sneak thief".

Whoa dude, my computer is, like, seriously deranged. I'm taking it to see my friend; she's, like, an akisu ninja. She can fix anything.

akisu ninja by rinchomatic September 8, 2009

Super Ninja Awesome 

(adj.) A phrase used to describe someone who has surpassed bland old regular awesome, and has achieved a certain level of slyness. Once these two qualities have combined one has become Super Ninja Awesome.

Person 1: Gawd you are so sly, that was so awesome!

Person 2: Yeah, its because I'm Super Ninja Awesome

Super Ninja Awesome by Slyyyyyyyyy February 5, 2010