A derogatory term used to describe those of the living dead race, often used to harass them concerning their endless quest for brain matter. Occasionally used by "zombies" themselves when referring to each other because, it's only "OK" when they say it.
Stereotypical Southern Person: "We don't like your kind round here, braindawg..."
Person 1: "Psh, we don't hire stupid braindawgs here."
Zombie 1: "Rgghhhhhhhh gurglhgggg (Yo, what's up my braindawgs?)"