In chat, it is the act of saying something before someone else. It only counts if someone else actually says the same thing afterwards.
by CraziAsian.... The one and onl February 08, 2010
(V): When someone gives another person such a good comeback that the person being exposed to the torment never even sees it coming. But the burn does not end there my amigos. The Ninja'er comes back for a second attack, ending with their battle cry, "Ninja'd!" Then disappears before you even have time to pee your pants from shock. Here's a diaper baby, clean yo'self up. You be dirtying up my new kitchen floors. .. bitch.
Person A: "I think I was just Ninja'd and I may or may not have just pee'd a little bit."
Person B: "Ninja'd!" *Disappears*
Person B: "Ninja'd!" *Disappears*
by Captain Elbow October 01, 2010
after sexual intercourse the act of walking across the room taking off the condom and quickly spinning around and throwing said condom at the woman's face like a shruiken
by Jeffery Harrison Nancy November 03, 2007
A new tactic the the FPS Xbox 360 game, Halo 3. A Player lures another player into following them. Player 2 is following player 1. Player 1 goes around a corner. Player 2 Follows. Player 1 jumps backwards, and Player 2 passes under Player 1. Player 1 Melee's Player 2 and instantly dies due to an assassination. Ergo, Ninja'd.
by THISxGuy March 09, 2010
the act of doing something successfully in a stealthy manner & when exiting the scene, you say "Ninja" in a spooky tone to rattle other people in the area who didn't realize wtf was going on.
by L0Lpants July 20, 2011
When a Nerd playing World of Warcraft, steals an item that he has no apparent use for and his group member needed it.
by Dwnsdr3 March 03, 2010
by Lil Matt 88 September 17, 2008