So “yall” “y’all” is slang for yous?
We was yuzzed! It happened in a diner in Eastern Pennsylvania. “Can I get anyting else for yuz, Hon? I wonder if that is a variation.
Not really; same idea, but with independent origins.
One of the points of my article is that words like “yous” and “you’ns” aren’t slang; they were accepted forms which eventually weren’t taken into “standard” American English.