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ninJax is the owned feeling when you just got aced/clutched by the other team in Counter-Strike.

The think you say to rub it in the next round when you do something amazing.
Damn you just got ninJaxed for shizzle that round.

Did you see me ninJax that guy in the face? I was all like WHICHA! and i pwned him in da dome"
by Corey M. August 31, 2004
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