Definition of on one's hind legs in English:

on one's hind legs

phrase

British
dated, informal
  • Standing up to make a speech.

    ‘he wasn't afraid to get up on his hind legs at a social gathering and talk’
    • ‘All you wanted was a chance to stand on your hind legs and make a speech.’
    • ‘He was up on his hind legs recently giving an impassioned plea for young people to participate in politics.’
    • ‘And then there are times when we have to stand up on our hind legs and put up a glorious fight against all reason.’