What Does Brass Monkey Mean?

**Brass Monkey** is an idiom describing a cold and unpleasant winter’s day, likening it to a monkey made of brass. The phrase has been traced back to the early 19th century in its literal sense, and was extended to its figurative meaning in the 1940s by American servicemen in World War II. It is also used as the title of a popular song by The Beastie Boys.

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