Still, my jams rock the body like kidney stones
When I pass through,

from Shad – Wild Lyrics on Rap Genius

Meaning

Even though Shad isn’t rich and his life has ups and downs his music/jams will still rock your body like a kidney stone which is essentially a rock in your body

Kidney stones also “pass through” your body so when Shad’s tunes pass through your ears they’ll also rock you

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