Gravy Smacker. A black person with large, gravy smackin lips. A black person known to eat greasy food (such as fried chicken) and talk with his mouth full, thus spraying grease droplets and crumbs all over other people within range.
Miriam- "Look at all these fucking gravy smackers! Let's go somewhere else to eat."
Webster- "Yeah, you're right. I should have known KFC would be full of gravy smackers. Let's bounce!"