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 3, 2007
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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.
Blue Player: "YOU JUSt GOT NINJA'D!"

Red Player: "STFU"
by THISxGuy March 9, 2010
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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.
Dude, you hella Ninja'd his oblivious dumb-ass!
by L0Lpants July 20, 2011
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When a Nerd playing World of Warcraft, steals an item that he has no apparent use for and his group member needed it.
He just took my epic sword and he cant even use it. He ninja'd my sword!!!
by Dwnsdr3 March 3, 2010
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to be extremely high yet act so sober that no one was able to tell the difference.
Kevan ninja'd everyone at the party last night.
by Lil Matt 88 September 17, 2008
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When you are about to answer something, but sombody says it first by a tiny bit.
Teacher: What is 2 + 2?
Guy 1: Th---
Guy 2: The answer is 4.

Guy 1 got audio-ninja'd.
by AwfulDarkJedi May 30, 2009
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(verb) to mess with a member of the opposite sex's head, usually by women. Originates from the comedy routine of comedian Dane Cook.
"Peter needed to talk after Maria brain-ninja'd him."
by strongbadia7 November 14, 2007
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