"You is yankee speak."
As in "you guys", which is the same as someone screeching their nails on a chalk board.
My uncle (my father's brother) married the most special woman from TN who died some 15 years ago. She said some of the most strange things or said them in the strangest way. Some of the close cousins that grew up when she was still alive even now will use some of her words kind of as an inside thing, then inevitably someone will say, "I sure do miss Aunt Ruth."