Here’s a volume of dictionaries I’d love to own: The Dictionary of American Regional English and here’s 100 words from them.
My exposure to American Regional English may have mainly been through song so far.
I enjoyed parrot-toed, nebby and quill pig in the list. (could be handily patch worked into he was a nebby, parrot-toed, old quill pig)
I have a relative who uses futz and putzing around so that word crosses the border.