Someone who doesn't sweat, fears, bleeds, or sheds tears in the face of adversity.
"– Man, that was dope!
– You think?
What're you, like, a third degree black belt?
– Actually, I'm not even in karate but I've found... my inner ninja!"

See. "My inner ninja" song by Classified.
by ChickaBOM February 10, 2014
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