A low quality beer. Most commonly seen today in small town hick bars or on college campus by fratties who have no clue what good beer tastes like, but remember their white trash father used to chug one down before beating on him and his mother.
See also Piss Water
Dumb Frattie Sheep: "Yo, Chad. Toss me another Pabst, Bra!"
Alfa-Male Frattie: "Fuck you, Chad. Get your own, Bra!"