IdiomBody & SensesEnglish

put one's money where one's mouth is

Meaning: To back up one's words with money or action.

Example: “If you're so sure the horse will win, put your money where your mouth is.”

Equivalents in other languages

Origin: From betting: someone boasting about a sure outcome is challenged to back their words (their "mouth") with a real wager. The phrase is American from the 1930s and 1940s.

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