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1.
Guy who likes to screw chicks violently and fast, like a ninja, sometimes in a public place. The girl is usually someone the "ninja fucker" has just met.
Man, after that quickie I had in the bathroom at the bar I feel like a stealthy ninja fucker!
by StinkyTee July 28, 2006
 
2.
A person who like to have sex with ninjas. Most of them are homosexual men from Polan.
Look at that polak nigga having sex with a ninja. what a ninja fucker!
by Jay Dizzle March 16, 2005