His mouthpiece for a Cadillac emblem
That's analogy and metaphor for you

from Eminem (Ft. Kendrick Lamar) – Love Game Lyrics on Rap Genius

Meaning

After getting hit in his grill (mouth), it looks like the grill of a Cadillac. Sometimes words can be fun.

He out here teaching English lessons

Ain’t it cool how he works a prestigious car brand into a metaphor about beating the shit out of a public enemy? Even when Kendrick’s inciting violence he’s doing it, you know, expensively.

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