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A hidden city on an island where only ninjas live. The city is massive. It holds 900,000 ninjas preparing for ninjapocalypse. The city is so stealth that it can't be seen even by sattelites.
Ninja city is the largest hidden city.
by beattie April 11, 2005
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adj. to have the attributes and characteristics of a ninja.
First used in the primal circles of the ninja clans to describe the measurement of a ninjas ability to do ninja like things.
He had so much ninjacity that the pirate never even saw his death coming.

He killed that man with so much ninjacity that his head splattered across the entire room.
by Jon Schroeder October 08, 2007
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