ninja mail 

Inter-office mail that shows up out of nowhere. It just magically appears in your inbox and you have no idea who left it.

I think Debbie left that ninja mail in my inbox again today, but I can never catch her in the act.

ninja mail by badandy519 August 25, 2009

ninja 

A person, usually part of a group, who kidnaps loved ones and friends unexpectedly and cuts off all communication to that person for extended periods of time, until its demands are met, usually involving pizza or other greasy foods.

The ninjas kidnapped her! We might never see her again, unless we give them each slices of pizza!

ninja by Ninjafied August 27, 2009

ninja clouding 

when someone suddenly disappears so quickly that no one notices and everyone is so confused as to where or how that person left without any hint of them leaving. they've gotten so far away in such a short span of time its simply impossible for you not to have noticed and you wonder if secretly thye are ninjas.

you're talking to your friends and suddenly you look away and look back......there were seven of you three seconds ago....now where'd he go? your friend is ninja clouding on you

ninja clouding by ninja chik August 30, 2009

Ninja 

Ninja is a non-insulting way to refer to a black person. Replacing the obvious racist noun used to refer to black people

Yo, thats my ninja over there!

Ninja by FrankieDillinger September 16, 2009

ninja card 

Being tested for HIV and coming back positive. "Drawing the ninja card."

nick: "Hey, SHELLEY, did you get those tests results back?"

SHELLEY: "Yeah... I drew the ninja card."

AZ: "All bets are off, you got the death sentence!"

nick: "Oh, I'm so sorry! Life gets more complicated now!"

ninja card by John Q. Public, Esq. September 25, 2009

ninja 

ninja means nigga

yall ninjas are tweakin..

naa my ninja I'm never wack...

ninja by afrokid101 October 25, 2009

ninja-thirty 

The time when you look at a clock and realize that a large portion of time disappeared. It is NEVER 'ninja o'clock', because by the time you've realized the time, it's at least a half-hour after you expected.

Friend 1: "Dude, what the hell happened to the day? I had that interview for that job."

Friend 2: "Ninja-thirty happened, son... remember that 'I'm only going to play a couple games' Madden marathon we just had?"

ninja-thirty by Agent 14 December 16, 2009