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 8, 2010
Get the Ninja'dmug. (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 1, 2010
Get the Ninja'dmug. 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
I totally Ninja'd that ho last night!
by Jeffery Harrison Nancy November 23, 2007
Get the Ninja'dmug. 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 9, 2010
Get the Ninja'dmug. 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 19, 2011
Get the Ninja'dmug. 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 2, 2010
Get the Ninja'dmug. by Lil Matt 88 October 31, 2008
Get the Ninja'dmug.