Ninja 

When you disappear behind a thick puff of smoke. Works better with a hookah; inhale the smoke and then slowly breathe out. Make sure to be standing near a place where you would hide yourself.

Ambrose - Okay guys, check it out! (creates a huge smokescreen and disappears behind the curtain)
Buds - WTF? This dude must be a fucking ninja!

Ninja by Ambrose Zeppo December 4, 2009

Ninja 

1.(adj) Used to describe something that is so awesome it blows your mind. Comes from the fact that ninjas are well..ninja.
2.Can also be used as a characteristic to describe a person or thing.

1. "Did you see those gangstas on scooters rockin there kickass skillz before??" "Yeah, it was so ninja!"
2. "That girl is so ninja for starting the use of the word ninja in many people's daily life.
3. Daybies think that's so endo when really it's not even ninja.

Ninja by Sniperx992 January 27, 2010

ninjaboo 

cool in a scary way; completely and totally awesome

That movie was so ninjaboo!

ninjaboo by sophnjoan February 19, 2010

Ninja 

A silent killer that orriginated from japan. They are common to were black cloths and carry an assourtment of wepons.

I did not see him! He was like a ninja!

He killed him so fast he was like a ninja!

Ninja by Conman27 May 5, 2010

ninja 

Something nearly every single azn that exists claims to be.

Derek: ZOMG IEM LIEK SOOOOO NINJA ASSASIN LOLOLOLOLOLOL XD XD XD XD

John: No. No, your not. Your a basement dwelling otaku with no friends. GTFO.

ninja by Pencilz June 3, 2010

Ninja Refill 

When you are at a restaurant and have a drink that the waiter asks to refill. You say no. Thirty seconds later, your drink is full and you have no idea what happened.

Waiter: Would you like more coke?

You No thank you I'm fine.

Waiter: okay...

***30 seconds pass***
You go to take a sip and your cup is full.

You:....What the...wow...Ninja refill

Ninja Refill by ianjker December 18, 2010

Ninja Moment

1.when one's reactions are unusually fast, like that of a ninja's.

2. when one seems to appear out of nowhere, often "appearing" in the middle of a conversation between two other individuals.

1.*drops phone and catches it in mid air*
Bob: "DUUDEE! nice catch!"
Jimmy: "i know,that was a total ninja moment."

2. Ellie: "...that test was really difficult! I left loads of questions out!"
Sophie: "i left out about five questions."
Emily: "i left out three"
Ellie: "woah! emily, where did you come from!"
Sophie: "ninja moment."

Ninja Moment by b-l-e-a-c-h-i-e December 14, 2010