"Pookie n nem" are the proverbial ominous "hood" characters and or family member that every person with a connection to the ghetto knows. They can be called at will to "whoop" and or "bust a cap in" yo ass...
Can also be used to refer to any random people you know in the ghetto...
"I need you get grab Cousin Pookie to vote. I need you to get Ray-Ray to vote." - Obama
M: Oh, that is such a ghetto thing to do!
R: Oh fo real? Let's see how ghetto it get's when I call cousin pookie an ray ray n nem to bust a cap in yo ass!
D: Where you at?
L:I'm up the street from from "Pookie n nem"