Definition of cop on in English:

cop on

phrasal verb

Irish
informal
  • 1Become aware of something.

    ‘she never copped on—you've no idea of the guilt I went through’
    • ‘The bad news for him is that others have copped on to his game.’
    • ‘‘I didn't think he was serious at first, but then I copped on I said I'd let him sweat it out for a minute,’ the thrilled bride-to-be joked afterwards.’
    • ‘It also copped on to the fact that real global power is measured by how far you can project that power.’
    • ‘‘There has been a rise in applications because parents are copping on that without them pushing for the help their children need, nobody will look out for them,’ she said.’
    • ‘Eventually the Romans copped on to the unifying power of currency and circulated their coins widely throughout the empire.’
    1. 1.1as imperative Used as a way of telling someone not to be so stupid.
      ‘ah, cop on, I was only messin'’