Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “be all mouth”

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.Talkative and eloquent
(Definition of be all mouth from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Translations of “be all mouth”

Word of the Day

exercise

physical activity that you do to make your body strong and healthy

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More