Homie, you need that white, Ajax

from Erick Sermon (Ft. Fred The Godson, Mone & Swizz Beatz) – Set It Off (2012 version) Lyrics on Rap Genius

Meaning

This line refers to their means of money production, selling cocaine.
White is a street term for cocaine, and Ajax is a type of bleach, which is commonly be used in cocaine purification.

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