by moshpit-23 November 30, 2006
–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 06, 2010
The one person you always try to,avoid at the bar but he somehow seems to show up out of nowhere and spews his drunk stupidity at you.
My girlfriend and I were having a great time at the bar last night and out of nowhere Pat appears , completely drunk , talking about his latest female conquest. He is such a fucking Alcoholic Ninja!
by Urban humor May 27, 2017
A Time Ninja is a person whos asks questions about a service and has no intentions of spending a dime with you on any of the services you just spent 30 min explaining.
Hello buddy how much is my air filter coolant flush and trans fluid exchange! Well sir it runs 300 dollars! Thank you buddy this is a great price! ok sir we can take care of this right away. Ok buddy go ahead and check them and ill come back another day! thank you for wasting my time ninja
by seawizz October 10, 2013
by TurboTurbo January 09, 2011
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.
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!
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 13, 2010
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 06, 2010