Similar to Porch monkey, except instead of random people hanging on porches, they're on they're ghetto yard instead.
Lady: Dar-rell, you still in yo yard?
Dar-rell: Yeeahhh, I have so much swag I don't even needa be doing anything in it.
Lady: You yard monkey lookin' nigga, you.
The smell that people have, particulary children, that have been playing outside all and have a yard like sent to them.
When little Johnny came in from playing outside with his friends his mother looked at him and said, "You smell like a yard monkey".