Meaning of “be all mouth” in the English Dictionary


"be all mouth" in English

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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 he's all mouth.

(Definition of “be all mouth” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

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