There are various dialects in the United States. One of them is called Black English or African_American Vernacular English (AAVE).
African-American Vernacular English (AAVE, /ˈɑːveɪ, ˈæv/), known less precisely as Black Vernacular, Black English Vernacular (BEV), Black Vernacular English (BVE) or colloquially Ebonics (a controversial term), is the variety (dialect, ethnolect and sociolect) of English natively spoken, particularly in urban communities, by most working- and middle-class African Americans and some Black Canadians.
Having its own unique grammatical, vocabulary and accent features, African-American Vernacular English is employed by middle-class African Americans as the more informal and casual end of a sociolinguistic continuum; on the formal end of this continuum, middle-class African-Americans switch to more standard English grammar and vocabulary, usually while retaining elements of the nonstandard accent.
As with most African-American English, African-American Vernacular English shares a large portion of its grammar and phonology with the rural dialects of the Southern United States, and especially older Southern American English, due to historical connections to the region.
source - https://en.wikipedia.org/wiki/African-American_Vernacular_English