Bottle of brown

from Travis Barker & Yelawolf (Ft. Skinhead Rob & Tim Armstrong) – Push 'Em Lyrics on Rap Genius

Meaning

He is refering to whiskey, both since Yela is quite a whiskey drinking, we don’t what label. But he could be referring to Jack Daniels:

Or Johnny Walker:

Or a third one.
Yela is such a whiskey-lover that he has made a group with fellow rapper Rittz named Whiskey boys — he have dropped the song Hammertime.

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