I was born in the era of heroin and freebase
Crack changed the hustle, I seen it reshape

from Troy Ave (Ft. Pusha T) – Concrete Jungle Lyrics on Rap Genius

Meaning

Pusha was born in 1977, before crack cocaine (infamously cheap) was made available. When crack hit the streets, a whole new drug was made to sell in the slums of America, which changed the drug game.

There’s also some wordplay here. Crack is a reshaped form of cocaine powder, just as crack reshaped the narcotic business.

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