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 9, 2013

by TurboTurbo January 10, 2011

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

Describes a mate or partner that has perfected his craft through years of seeming like a great catch when in all actuality...he suddenly, and stealthily reveals himself as a complete douche bag.
Great husband and family man...and poof, the douche ninja comes out of nowhere and reveals that he is a cheating, lying scumbag. You had no idea. Surprise attack. Many victims.
by Sonny James August 29, 2013

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

by sparklinwiggler October 19, 2008

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?
Friend 2: what?
Friend 1: ninja sneeze
Friend 2: aw, i hate that
Friend 1: i know right?
by XxCottonCandyStarsxX May 18, 2009
