Yard Ninja 

Negative term used for black people. Similar to porche monkey.

Tyrone is such a yard ninja. All he does is lift weights in his front lawn but he never gets bigger.

Yard Ninja by Greek Bastard July 22, 2009

Yard Ninja 

Noun - A short ninja, around two feet tall, that reside in the yard in the night time. They continually stare into the windows of the residents house, as a voyeur, giggled in the background. If a person is vigilant enough, they can catch them in action. Yard Ninjas are weak against the common porcupine, but cannot be killed by one. Yard Ninjas originated around the 1300's AD, when they were discovered trampling on the grave of William Wallace

I caught me a Yard Ninja last night, bugger had 13 of my collectable Pez dispensers.... I'm gonna buy me some guard porcupines..

Yard Ninja by The Dylanatron December 24, 2010