So much champagne, I drowned in it
OG, rolled a pound of it
Keep it G, you like the sound of it

from Wiz Khalifa (Ft. Juicy J) – Stu Lyrics on Rap Genius

Meaning

Niggas saying he drowning in a champagne pool.

Wiz continues the druggie lyrics by mentioning OG
From UD: Orangutan Ganja — Really strong weed that Asian Orangutans smoked with Budda. Now used as a marketing term universal adjective that has largely lost its original meaning. Used to describe strong weed (i.e., OG Kush, OG Sativa, OG Indica, etc.).

Finally he references another druggie rappers song, A$AP Rocky’s Keep it G

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