Definition of be all mouth (and no trousers) in English:

be all mouth (and no trousers)

phrase

informal
  • Tend to talk boastfully without any intention of acting on one's words.

    ‘he thought Francis was all mouth’
    ‘the company has responded to taunts that it is all mouth and no trousers’
    • ‘We all know that down in London they are all mouth and no trousers.’
    • ‘He said that local politicians ‘were all mouth and no action’ on the issue and surely they could be doing more.’
    • ‘Sadly, like many a learnèd professional, she was all mouth and no backbone.’
    • ‘Were they a serious threat or all mouth and no trousers?’
    • ‘Paul is being given advice about what to do on a date from his been-there-done-that pal Troy, who is all mouth and no trousers.’
    • ‘He has acquired a bit of a reputation for being all mouth and no trousers.’
    • ‘As far as I am concerned, she is all mouth and no trousers.’
    • ‘He could never be accused of being all mouth and no trousers.’
    • ‘As far as I am concerned she is all mouth and no trousers.’
    • ‘‘I guess it's just another case of a man who's all mouth and no trousers…’ I giggle, before climbing the stairs to my sanctuary.’
    boasting, bragging, empty talk, idle talk, bombast, fustian
    View synonyms