I'm from where the cut-throats cut coke

from Joell Ortiz – Battle Cry Lyrics on Rap Genius

Meaning

Joell is from The Cooper Projects in B.K.
There are a lot of killers(cut-throats) that sell cocaine. When a dealer cuts the coke with other substances, it dilutes it and makes it less potent but adds mass. Cut can also mean divide (in order to snort through tube/straw)

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