The end product of months of immense training, in the form of a kitten. In short, the ultimate weapon.
Ninja Cat Bob: It sure feels good to have butt secks.
Ninja Cat Henry: That's right.
by Mister Sambert August 12, 2006
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Some fucker who thinks he's a badass online, but in reality isn't shit. Yet another nobody who likes bullshit like "lolcats," martial arts (but probably has never bothered to learn any) and using words like "kitteh" and such, while thinking he is some kind of tough guy at the same time. Probably spends most of his income on his addictions of WoW and "adult" anime shows.
Ninja Cat thought he was a badass after making an asinine claim on a forum. Later that night he stepped outside of his building to buy anime porn after a failed WoW raid and mouthed off to a guy, who struck Ninja Cat in the head with a baseball bat. He was left to bleed on the concrete, and when his fat goth girlfriend came to check on him, she found his stash of anime porn and dumped his worthless ass.
by Nerd Please May 27, 2009
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1. To be as stealthy as a cat and a ninja combined.

2. a house cat that has dedicated its life to the ninja life style.

3. a ninja who wears cat ears.
you have to be quick, like a cat... or a ninja, or a cat ninja.
by bnate April 9, 2010
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It has been said that long, long ago, a young boy who was but only 9 years old, witness the gruesome and brutal murder of his beloved parents by the " Hell Hounds" an international street gang/mafia/bad guys...poor little boy found himself wondering on the lonely and terrifying streets.

When something....

Something unbelievable happened !!

A big black cat with a ninja mask and a scratch on it's left eye with gray spiky hair has taken that boy and desided to raise him like one of its own.

9 years have past since then...the young boy has finally become a man and has been taught and trained by the black cat which at the end made the boy become the first ever Cat Ninja, after that, the cat ninja swore that he will find the Hell Hounds and kill every last one of them.

...and so he did
Bad guy: Give me your money, jewelry and BBQ !

Civilian: Never ! because i've just called Cat Ninja :)

Bad guy: OOOHH FISH BALLS !!!
by DannyRanDazzle May 24, 2011
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Someone who is raicist and lies and stirs stuff up with other comunitys and people tend to fall for what she does
Hey look its karen the cat ninja the person no one likes
by Troll destroyer May 22, 2022
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