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English definition of “be all mouth”

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be all mouth

( UK also be all mouth and no trousers) informal
to talk a lot about doing something but never do it: He says he's going to complain to the manager, but I reckon he's all mouth.
Translations of “be all mouth”
in Chinese (Traditional) 只說不做…
in Chinese (Simplified) 只说不做…
(Definition of be all mouth from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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