(v.) to excessively and wildly dismember a person's body using Asian weaponry (gallons of blood are typically lost from the victim's body when being ninja assassined)
Witness 1: Dude you completely ninja assassined that guy!
Assassin: Yeah I'm going cut his limbs off too.
Witness 2: Holy shit! There's blood everywhere!
by Kushikime December 2, 2009
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In roleplaying games (especially ones not centred around physical conflict), a character who has been designed expressly to be extremely powerful in a fight and/or extremely stealthy.
The term is frequently used sarcastically, as creating such a character is often a sign that the person doing so still thinks he's playing D&D.
Did you see the new guy's character? He's a complete ninja assassin.
by Whybird June 8, 2004
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The greatest movie of all time. There's so much body dismembering and excessive amounts of blood that it keeps you entertained throughout the movie.
Guy 1: Man, i saw Ninja Assassin the other day

Guy 2: Oh me too, there's so much blood i could have sworn i was watching a documentary on PMS!

Guy 1: o.O
by The Notorious Poon Slayer April 15, 2010
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The name belonging to a sexy humble man, with a pretty nice behind. He is so loveable and the perfect prince charming. After sweeping so many girls off their feet, he finally settled down with that one chica. Am amazing boyfriend, and perfect companion for anytime, anywhere. Up for almost anything. He's got jokes like the joker and walks with attitude. Oh, and apparently, he's pretty gangster.
-OH, it smells kind of like sex..

-It's me. My new perfume called Nigel (aka) Ninja Assassin. It 's the new thing!
by Ninja Assassin4^* June 17, 2011
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