Definition of up one's sleeve in US English:

phrase

• (of a strategy, idea, or resource) kept secret and in reserve for use when needed.

  ‘he was new to the game but had a few tricks up his sleeve’

  More example sentences

  • ‘I still have a few ideas up my sleeve, which will inevitably disappoint some readers and please others.’
  • ‘Your hand will reveal who you are - and what tricks you may have up your sleeve…’
  • ‘There are still some ideas up my sleeve - including book lists to be added to the library.’
  • ‘They will also have a few tricks up their sleeve and perhaps change the way they play to catch us out this week.’
  • ‘Do you have any tricks up your sleeve to give business spending a boost?’
  • ‘‘At the same time, we needed to have a few tricks up our sleeve to surprise the audience,’ he says.’
  • ‘Annie puts her success down to eating wholesome, home-cooked food, while Dorothy has another secret up her sleeve.’
  • ‘Lubar has several successful strategies up his sleeve that keep us laughing.’
  • ‘He said he has a secret sound effect up his sleeve to accompany a flash of lightning but the audience will have to wait and see how this is accomplished.’
  • ‘I'll bet you're sitting there with a thousand ideas up your sleeve.’