tommy: i started out drinking molson, but i've poured so much other shit in this bastard beer that i don't know what i'm drinking
a glass/cup/mug of beer that comes from multiple pitchers over the course of the night, and which is of questionable origin
"tommy: i started out drinking molson, but i've poured so much other shit in this bastard beer that i don't know what i'm drinking" What is the definition of "bastard beer"?