I think my english's getting real real bad
Cause this dumb bitch said I'm real real bad

from James Blake (Ft. Chance The Rapper) – Life Round Here (Remix) Lyrics on Rap Genius

Meaning

Chance doesn’t understand the girl’s slang. She calls him “real, real bad”, but surely she means that he is real good. Maybe if he understood he would agree with her.

Or Chance could simply be disagreeing with the “dumb bitch” that doesn’t like his music.
Why wouldn’t he be good?

He got the juice!

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