They said "don't knock it, mind your business
His business isn't mine and that nigga pimping got it"

from Lupe Fiasco – Hurt Me Soul Lyrics on Rap Genius

Meaning

Lupe is told that he shouldn’t “knock” (criticize) pimping, as it’s none of your business and the pimps have “got it” (money)

Very smart of Lupe: These lines tie Jay-Z and the theme of prostitution together. It seems he’s talking about prostitution, but keep in mind:

Jay-Z’s hustle can’t be knocked, Lupe’s better mind his own business,big pimping’s to be left alone.

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