Used to describe cold weather, this saying derives from the traditional Navy phrase "cold enough to freeze the balls off a brass monkey". This references the brass structure or 'monkey' where cannon balls were stacked.

The expression: "It is cold enough to freeze the balls of a brass monkey" comes from the practice of putting iron cannon balls on a dimpled brass plate on the deck of a war-ship. When very cold the brass contracted sufficiently to cause the iron balls to fall out.

It was widely and incorrectly believed that the Beastie Boys were referring to a different drink made from a 40-ounce container of malt liquor mixed with orange juice ("forty" is mentioned in the lyrics); however, Mike D has publicly confirmed that the premixed Heublein cocktail was their inspiration.

Yes, the brass monkey is a real drink! The recipe is typically made with orange juice, vodka, and dark rum. Can you still buy brass monkey liquor? Yes, brass monkey liquor is still available for purchase.