Po'n lean in my styrogoam, this is how I Screw

from Gucci Mane (Ft. OJ Da Juiceman & Waka Flocka Flame) – What I Do Lyrics on Rap Genius

Meaning

Barney is some sort of cough syrup based drink because of its purple color. Probably Tussen-X, Hydrocodine, or Promethazine mixed with sprite to make it taste less like shit.

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