Keep the lanes clear, and the cats that's all about scrap remain here
On top of this Metropolis

from Jay Z – Can't Knock the Hustle (Remix) Lyrics on Rap Genius


Get out the way of the money if you are not trying get rich like my team is, the word “SCRAP” is a misspelling and he was referring to Scratch, which means cash when referenced in the book Pimp, by Robert Beck, Iceberg Slim, who Jay-z also referenced himself as.
So if you about Scratch which is money you stay on top of the world. or Metropolis as he stated.

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