Remember the '90s, when your snarky friends suggested you solve all of your problems by taking a "chill pill"? Atlas Obscura does, too, and they just took a fascinating look at the history of the term.
In the 1800s, multiple books featured different recipes for a "chill pill" you could make at home, suggesting it would relieve your fever-induced chills when taken multiple times per day. The wonderfully named Non-Secret Formulas included a recipe for quinine, cinchona, and oil of black pepper.
Any connection between the two uses of "chill pill" throughout history, slang lexicographer Jonathon Green told Atlas Obscura, is "very felicitous and a rather charming coincidence."
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