The words on your list, Max, are not used exclusively by "blacks" in the US. I'm "white" and I use a few of them myself -- 'cuz, outta, in particular from this list -- in everyday speech. Most of those words don't come up in my usual topic of conversation. "Y'all" is Southern and used by just about anybody living in the Southern US. I lived there for about 10 years and had a bit of a Southern accent myself for awhile.
Not sure if this is a typo or not, but
hos = hookerS
ho = hooker
It comes from the pronunciation of the word "whore."
I wanted to mention that "thing/thang" when used with "do your" has a little different meaning. To "do your thing" is to do what you want, what you usually do, don't be shy about it. So it's like you supposed, "negócio," but maybe referring in a song to dancing.
"…Do ya thang like there aint nothin to it ..."
Do your dance, baby! Shake your groove thing :) :) :) depends on the context in the song.
And here's an instance where "ya" = your :)
Abraços a todos :)