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

Person 1 " so hows life"
Person 2 " its a secret"
Person 1 " you can tell me your secret"
Person 2" its a ninja secret"
Person 1 " what?!"
Person 2 " I dont even know the secret, there for its a ninja secret"
Person 2 " its a secret"
Person 1 " you can tell me your secret"
Person 2" its a ninja secret"
Person 1 " what?!"
Person 2 " I dont even know the secret, there for its a ninja secret"
by secretkeeper524 February 3, 2012

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

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

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

In RPGs and some MMORPgs, is another word for a character that can be in the forefront of the battle and survive the outcome due to sheer evasiveness rather than high armor and health. An example would be the assassin from the pseudo-MMORPG game "Guild Wars", especially in PvP mode.
by BinaryEmperor August 18, 2008

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.
by Matt Wrong April 20, 2011
