Uh, black girl sippin' white wine
The contrast of the black girl drinking a glass of white wine plays into the civil rights simile in the next line.
It could be a throwback to the line in “New Slaves” where his mother lived in the era when clean water was only served to the fairer skin. Maybe this is some high-quality wine that most African-Americans could have never dreamed of drinking just a generation ago, i.e. white wine, wine for whites.
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