Ninja ichiban 

Manga character. Ninja Number one. Very cool. Ninja Ichiban may also go by the name of Callan.

Ninja Ichiban kicked my ass because he is so cool.

Ninja ichiban by Callan February 27, 2005

ninja nap 

falling asleep without no one noticing.

Eman: Hey wheres Don?
Marty: There he is, hes asleep.
Eman: Oh man, hes quick. He ninja napped.

ninja nap by shortychopo January 17, 2011

butt ninja 

The state of a ninja where you rape people's butts

"dude my butt just got raped..."
"By who?"
"I have no clue"
"Maybe it was a butt ninja"

butt ninja by theylimek May 11, 2010

Pink Ninja 

Some may call it an alternative to the word "penis"; however, let us think for a moment upon the implications.

Pink Ninja is stealthy and covert....making it's way in unnoticed....this is not a positive thing.

When he deployed his pink ninja, her response was thus, "Is it in yet?"...

Pink Ninja by IDidItFortheLulz November 15, 2013

Ninja Juice 

To obtain the sacred "Ninja Juice" is the first task given to an up-and-coming ninja hopeful.

The sacred "Ninja Juice" can only be drunken by the mighty Rae (ninja) of the UD chatroom but must be served to Ms. Rae by any other unlucky mofo.

"Ninja Juice" is also a tastey treat for any full-fledged ninjas and you can often see many famous nin drinking it.

Example 1:
young_Gun (of UD): I wanna be a ninja!
rae(ninja): Get me NINJA JUICE, NOW!
young_Gun: /gives ninja juice
rae(ninja): Haha. Owned.

Example 2:
Bruce Lee: OMG! I LOVE NINJA JUICE!
Naruto Uzumaki: I KNOW, LAWL!
Jet Li: It gives me super crazy awesome powers!
Koolaid Man: Oh yeah!

Ninja Juice by Rae [ninja] January 2, 2009

ginger ninja 

A young person with ginger hair who cannot clean their face properly, resulting in a humorous sight for onlookers.

Remember kids to clean your face properly, don't look like that f*cking ginger ninja.

ginger ninja by Giberzerker November 19, 2011

Ninja 

(adj) Awesome, cool, Amazing in every way

That movie last night was so ninja.

Ninja by Alex Franke May 6, 2008