2
The act of acting like a ninja.
So I was talking about sneaking into this house and I realized how ninja-y that sounded.

Yo dude, I was all ninja-y and shit.
by sweetlikesin January 15, 2009
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3
A ninja who is so badass they can fly.
Person 1: OMG! Do you see that Black Bird up in the sky!?!?!

Person 2: It's a Person!!! It's a Ninja!!! It's a Ninjay!!!
by SKB2792 September 24, 2011
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