Definition of knock someone dead in English:

knock someone dead

phrase

informal
  • Greatly impress someone.

    • ‘This album is trying too hard to be smooth and pleasing to the masses, meaning that Wright ends up crooning uninterestingly where she should be knocking us dead.’
    • ‘He is so confident that his new energy drink will knock them dead in the market place that he is planning to take on the likes of Lucozade and Red Bull.’
    • ‘I am 5ft 8in, size 8, and want to wear something that will knock him dead.’
    • ‘Mandy Siegfried proves herself a young comedienne who'll duly knock them dead from Mineola to Minnesota.’
    • ‘‘You're going to knock them dead,’ she stated firmly, ‘and you're more handsome than any of those actors.’’
    • ‘She had put on dark red lipstick and was wearing a dress that was sure to knock Chris dead.’
    • ‘Wear the pink strapless shirt in my second drawer - you'll knock him dead.’
    • ‘We've got an answering machine gag that seems to knock them dead every time.’
    • ‘I nodded and smiled faintly, ‘You're going to knock him dead tonight.’’
    • ‘Good luck for tonight: I'm sure you'll knock 'em dead!’
    make an impression on, have an impact on, influence, affect, leave a mark on, move, stir, rouse, excite, inspire, galvanize