I drink Moet with Medusa, give her shotguns in hell
from Nas – It Ain't Hard to Tell Lyrics on Rap Genius
To “shotgun” is to inhale from a pipe or other smoking device, followed shortly by an exhalation into someone else’s mouth. This term was developed by troops in Vietnam, who actually would put a marijuana cigarette into the open chamber of an unloaded shotgun and blow it into each others' faces (an example of this can be seen in the movie Platoon)
In Greek myth, Medusa had hair made of snakes, and her gaze would turn men to stone. But Nas is so bad, he can look Medusa straight in her eyes, and instead of him turning to stone, he gets her “stoned” by blowing weed smoke into her mouth, shotgun-style!

Moet is, of course, a champagne brand that’s popular with rappers
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