Brain Dawgs is sometimes used to express that the brain is not fully functional. Usually caused by sleepiness, or lack of energy. Like a fuzzy, or foggy feeling.
I've been asleep so long that I've got brain dawgs.
I need to go to sleep soon. I've got a case of brain dawgs.
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?)"
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).