The origin of the phrase "big mouth" is not definitively known, but it likely stems from the idea that a person with a physically larger mouth would be more prone to speaking loudly or indiscreetly. The term has been in use since the early 20th century and has become a common expression in English to describe someone who talks too much or shares information without discretion.

Определение и значение слова «big mouth» на английском языке

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