Definition of till the cows come home in English:

till the cows come home

phrase

informal
  • For an indefinitely long time.

    ‘those two could talk till the cows came home’
    • ‘These players can claim they are Irish till the cows come home but does anyone believe them?’
    • ‘The debate on whether the death penalty must be abolished or not will go on till the cows come home.’
    • ‘And from then on, it's rock n’ roll and dancing till the cows come home.’
    • ‘Surely she can carry on losing first-round matches till the cows come home.’
    • ‘We could auction these 2200 jobs till the cows come home, but it will be totally futile.’
    • ‘We may disapprove till the cows come home, it won't alter that fact.’
    • ‘Play it till the cows come home I say!’
    • ‘I can micro-multi-task till the cows come home.’
    • ‘Why do we build them, maintain them, extend them, lovingly twiddle about with them till the cows come home?’
    • ‘But, if you want to come in and be a good boy and work well, I'll help you till the cows come home.’