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Jacuzzi and silhouette are eponyms — that is, they derive from the names of people. An Italian immigrant to California invented the bubbly hot tub called a jacuzzi. And the word silhouette commemorates a penny-pinching treasury secretary who lasted...
The expression to wing it, meaning to perform by improvising or with little preparation, comes from the world of 19th-century theater, where it denoted the work of understudies who stepped onstage and received prompting from the wings of the stage...