Definition of sit up (and take notice) in English:

sit up (and take notice)

phrase

informal
  • Suddenly start paying attention or have one's interest aroused.

    ‘young people are voting with their feet—employers will have to sit up and take notice’
    • ‘And while the result was one the majority of pundits predicted, the Wasps' performance will have caused a few teams to sit up and take notice.’
    • ‘This is exactly the sort of statement that makes a book lover sit up and take notice and it certainly got my attention.’
    • ‘This presence in high profile Silicon Valley suddenly made the world sit up and take notice.’
    • ‘Parents say they hope the Department of Education will finally sit up and take notice of them, following Friday's protest.’
    • ‘The First Minister needs to sit up and take notice.’
    • ‘But he soon made the fashion world sit up and take notice.’
    • ‘If only the litter louts would now sit up and take notice.’
    • ‘There is just something I like about this picture, something that made us sit up and take notice…’
    • ‘A surprise move like that could get people to sit up and take notice.’
    • ‘Just as happened with the fuel crisis, the Westminster politicians will eventually have to sit up and take notice of Yorkshire's discontent.’