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The same as suicide but with a ninja instead of a gun, rope, car exhaust...ect.

Purposly picking a fight with a ninja because you have a death wish.
Dan: Hey ninja, what's the matter? wake up on the wrong side of your mother this morning??

<later at Dan's closed casket funeral>
John: So, how did Dan die?
Kate: it was ninjacide...
John: Sweet!
by neversweat May 18, 2006
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3
a ninja(s) committing genocide upon a species or certain group
1.The human race became extinct due to ninjacide.

2. All pirates were removed from existance with the act of ninjacide.
by Tre Jones November 17, 2007
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4
When all ninjas are completely wiped off the face of the earth.
No. They did it. The pirates commited Ninjacide. Dear god.
by beattie April 11, 2005
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