If someone’s a hoopie, it means they’re less than sophisticated. This term was used in the Ohio River Valley to refer to the bumpkins from West Virginia who performed menial work with barrels, hammering their hoops into place. This is...
The Dictionary of American Regional English traces you-uns, a plural form of you, to the Midlands and the Ohio River Valley. But the phrase goes back a while; even Chaucer used something similar. This is part of a complete episode.