But back to you, MAC gloss chick, you're way fit

from Ghostface Killah (Ft. Kanye West & Ne-Yo) – Back Like That (Remix) Lyrics on Rap Genius

Meaning

MAC is a brand of lip gloss

Fit is an English (UK) slang term to describe those who are very attractive. Maybe Ye picked up on some slang when he did his collab with Estelle.

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