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.
Another meaning is in the same context as the whole verse, which is sex. I guess most of you can understand what white wine could stand for (Semen).
This entire verse is about sex and explicit sexual content, so I wouldn’t be surprised if that’s what he meant.
To help improve the meaning of these lyrics, visit “I'm In It” by Kanye West (Ft. Assassin & Justin Vernon) Lyrics and leave a comment on the lyrics box