The unofficial mascot of Temple University in Philadelphia, PA.
Official mascot: Owl. Unofficial mascot: Brazen urban ninja squirrel.
To behave (or attempt to behave) in a ninja-esque manner, with agility, skills, subtlety, and stealth.
I was ninjaing my way around the house in the dark because I didn't want to wake the kids.
a super annoying video game enemy that can run really fast, even around corners, to make you waste all your ammo.
I tried to beat that game the other day but the extremely fast and agile and often invisible ninja bastard made me game over all night
Any secretive adventure legal or not, good or bad.
Damn my in-laws are visiting again! Gotta go on a ninja mission to get high!
Sarah just got a new girlfriend. She works at the mall. Ninja mission?
Marah just had her baby, let’s go on a ninja mission tonight and drop off some food!
the day where we applause ninja turtles
Tom: Hey did you know its national ninja turtle day
A person selling sexual services. One who is stealth. Strong. And willing. An escort or prostitute. A word that elevates the profession rather than it being derogatory.
Why don't you call and get a few sexy ninjas over here and we can all have a good time.
I'm a sexy ninja by profession.
Someone sitting in the stall next to you whom you never hear until the toilet flushes, the sink goes off or just the bathroom door open and close.
Jim heard what I said about him in the bathroom; damn he must be a stall ninja!