Lyric discussion by Black Dahlia 

Brass monkey is a mixed dring more or less like Long Island iced tea, but without the tea. Yes, I know there is no tea in LIit, it's just a splash of cola for color. Brass monkey tastes about the same but is yellow-orange. I've bought bottles of it in a liquor store before, but it's pretty rare.

That said, it sure does sound like the Beasties are referring to a beer or malt liquor.

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