They bones quiver, heard some clown throwing stones at us
A reference to the popular idiom “Sticks and stones may break my bones but words will never hurt me”
All Jay Rock is doing, is rapping. Despite his lines and verses just being words, and can’t physically hurt anyone other rappers are terrified of being targeted by Jay Rock, and they tremble in fear (“bones quiver”). So they attempt pre-emptive strikes by physical means simply out of fear that he may target them.
Jay Rock claims he “heard” these attempts, so they never actually hit him.
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