Definition of knock it off in English:

knock it off

phrase

informal
  • Used to tell someone to stop doing something that one finds annoying or foolish.

    • ‘Danielle, knock it off. The overprotective mother role doesn't suit you.’
    • ‘The couple who are renting the place next to mine spent the entire night fighting. They didn't knock it off until well past two in the morning.’
    • ‘If you're doing this as an attempt to Henry make break off his engagement with his fianceé, knock it off, because it ain't gonna happen!’
    stop it