Shoot your daughter in the calf muscle
Fuck a tussle,

from Jay Z (Ft. The Notorious B.I.G.) – Brooklyn's Finest Lyrics on Rap Genius

Meaning

Calf muscles are muscles in your legs. Getting shot in the cuff muscle not only stops you from walking but is also very very painful. He threatens his enemies, although your daughter is not directly involved in this I have to show you I’m not playing with you, I’m not scared of making your family pay for your mistakes.

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