Top Definition
A rare disease that gives you the skills of a level 8 ninja master.
Ninjavitus symptoms may include friends and family dying from sudden and uncontrollable karate chops, and the urge to carry ninja stars.
by Evan Salas March 18, 2007
1 more definition
The mysterious loss of a tooth or teeth.
I took a bite out of my sandwich and out came a tooth! Damn you, ninja-vitus
by DarthKawauso August 17, 2011

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