Sticks and stones break bones, but the gat'll kill you quicker

from The Notorious B.I.G. – Machine Gun Funk Lyrics on Rap Genius

Meaning

While his words can’t physically hurt you, some bullets from his guns sure as fuck can.

Maybe also a reference to the following line from “It’s Hard Being the Kane” (1990) by Big Daddy Kane, who is also from Brooklyn:

Holdin' my own on the microphone
Cause I break bones just like sticks and stones

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