1. One with the legendary ability to pass gas in a room full of people without being noticed.

2. A person of Indian heritage who looks to be of African descent.
1. I have never heard Frank fart. I believe he is a Ninja Boy.

2. I saw Isaiah eating curry. I think that he is a Ninja Boy.
by Laws of Gravity May 25, 2010
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When you’re texting in bed and you drop your phone on your face.
I ninja phoned myself last night.
by Hlsmyr52 December 12, 2021
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when things are going casually, and a friend surprise tickles you with the speed and agility of a ninja.
by ab09307 December 15, 2010
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