math ninja

–noun, plural -ja, -jas. a member of a modern society of mathematical agents, highly trained in stealth calculatons and number theory, who are hired for covert purposes ranging from solving the worlds problems to passing on their skills to the next generation.

Mr. Harris is a math ninja.

by KSignell February 6, 2010

ninja studying

when you pretend to be hard at work to get your mom off your back about homework, but you're really watching tv shows on hulu.

I was ninja studying last night. Learned everything off of bones and house. Think I'm ready for that biology test now!

by you can't see me! February 12, 2010

Ninja sneeze

when you think you're going to sneeze, but then you don't. it's there one moment, and then it just disappears like a ninja!

Friend 1: *look of concentration*....dang!
Friend 2: what?
Friend 1: ninja sneeze

Friend 2: aw, i hate that
Friend 1: i know right?

by XxCottonCandyStarsxX May 18, 2009

Door-Ninja

A person who slips in a door quickly before it closes without touching the door.

That bastard door-ninja didn't hold the door for me.

by TurboTurbo January 10, 2011

Ninja Chord

Usually played on guitar, but just the same on piano, this is a series of notes that requires the player to stretch their hands out as far as humanly possible.

I can't believe all that Ninja Chords that Al DiMeola played tonight!

by Matt Wrong April 20, 2011

pulled a ninja

When someone appears or disappears from the surrounding area with few or no people noticing.

Also when you do a really cool ninja move, especially if you could never do it again.

Joe: Oh, hi Jon.
Jon: Hi Joe.
Sam: Hey guys!
Joe: When did you get here?
Jon: He pulled a ninja.

Man: *drops glass*
Waiter: *catches glass without spilling drink*
Man: Wow, you just pulled a ninja!

by StarGazer453 October 15, 2010

ninja ant

When one is running in the grass, on the blacktop, ect. and trips for no apparent reason which causes them to fall on their face.

I was playing football in my backyard and running in hot for a touchdown when suddenly at the 5 yard line damn ninja ants attacked me just before the victory.

by keganzues November 9, 2010