Purple drink? Got that

from A$AP Rocky (Ft. ScHoolboy Q) – PMW (All I Really Need) Lyrics on Rap Genius

Meaning

Purple drank aka Sizzurp is slang term for a recreational drug popular in the hip hop community. Its main ingredient is prescription-strength cough syrup containing codeine and promethazine. Cough syrup is typically mixed with ingredients such as Sprite soft drink or Mountain Dew and pieces of Jolly Rancher candy. The purplish hue of purple drank comes from dyes in the cough syrup.

This is not the first time A$AP Rocky mentions Purple drank in one of his songs, he also did it in “Purple Swag”,
A$AP Rocky says:

Purple drink,
I still sip

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