Let it be known, gold ring embedded with stone
So when I punch you in the head, the shit'll dent up your dome

from Sean Price – Onion Head Lyrics on Rap Genius

Meaning

A nice brag that intertwines a symbol of his wealth with his ability to damage you: his ring has enough gems in it that it makes his punches even more powerful than normal. Thus, his punch will cause a dent in your skull

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