Chad’s particular notions of zombies were idiotic, and as far as I can tell, unprecedented.
Because a word already exists for his dumb zombie concept: possession. To Chad, when someone got possessed by a demon, some malignant spirit, or a worm/slug, they became a zombie.
This has nothing to do with classical zombies from Haitian culture or pop culture, which are reanimated corpses of some kind.
In short, Chad is a lazy idiot and couldn’t even steal well worn concepts correctly. His notion of zombie is an insult to classical and pop cultural zombies.
If he wasn’t such a lazy dimwit, he would’ve just used the term “possession.”