1 definition by Jon Schroeder

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 8, 2007
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