The idiom "shake a leg" originated in the early 19th century among sailors. In the cramped quarters of a ship, hammocks were used as beds, and when it was time to wake up, sailors would "shake a leg" to swing their legs out of the hammock and begin their day.

What is the origin of the idiom "shake a leg" and when to use it?

Определение и значение слова «shake a leg» на английском языке

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