big mouth definition, meaning - what is big mouth in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “big mouth”

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big mouth

noun [C usually singular] uk   us   informal disapproving
If someone is or has a big mouth, they often say things that are meant to be kept secret: He is/has such a big mouth. He went and opened his big mouth and told them the whole story.
Translations of “big mouth”
in Chinese (Traditional) 多嘴的人…
in Chinese (Simplified) 多嘴的人…
(Definition of big mouth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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