Rockin' nerd glasses
I dominate, y'all denominate fractions

from Earl Sweatshirt (Ft. Gruzen) – Fuck Your Compression Lyrics on Rap Genius

He rocks the glasses of nerds that are too busy denominating fractions while he is dominating the rap game!

He could also be dissing hipsters who rock nerd glasses

A fraction contains a numerator on the top and a denominator on the bottom. He is referencing that he is the dominant number, while everyone else is a denominator to a fraction, which is at the bottom.

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