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2. Ninja Mistake
Something that a ninja might say whenever he miscalculates something and makes an error.
"Whoops. Ninja mistake."
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by Deus Sep 9, 2004 add a video
1. Ninja Mistake
Something that doesn't exist.

Apparently, fate and Ninja Mistake are one and the same.
Ninja do not make a mistake, you fucktards.
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by lmao Nov 22, 2004 add a video
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