Bitch, splat! Only thing I fear in here is chit-chat
You are hearin' bars like your ear against a Kit Kat

from Royce Da 5'9" (Ft. Eminem) – Writer's Block Lyrics on Rap Genius


This is also an double entendre. He saying you are hearing his bars which means his raps. And, also means you are holding the kit kat bar against your ear.

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