I'm a Mac Pro with an afro

from Childish Gambino (Ft. Flynt Flossy & Yung Humma) – Fuck Your Blog Lyrics on Rap Genius

Meaning

A mac is another term for a person who gets a lot of women
Seeing as it’s an old word the afro probably the age of it

Childish could also be referring to a Mac 10 and saying he’s a pro with it

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