“The net worth of the average black household in the United States is $6,314, compared with $110,500 for the average white household, according to 2011 census data. The gap has worsened in the last decade, and the United States now has a greater wealth gap by race than South Africa did during apartheid. (Whites in America on average own almost 18 times as much as blacks; in South Africa in 1970, the ratio was about 15 times.)”
It’s called copula deletion, or zero copula. Many languages and dialects, including Ancient Greek and Russian, delete the copula (the verb to be) when the context is obvious.
So an utterance like “you a bitch” in AAVE is not an example of a misused you, but an example of a sentence that deletes the copular verb (are), which is a perfectly valid thing to do in that dialect, just as deleting an /r/ after a vowel is a perfectly valid thing to do in an upper-class British dialect.