give the show away

give the (whole) show away

To reveal something that was meant to be kept secret, especially a plan. You're going to give the show away if you don't quit whispering about it! They were trying to sneak up on the other team, but John's bright T-shirt gave the show away.
See also: away, give, show
Farlex Dictionary of Idioms.

give the (whole) show away

demonstrate the inadequacies or reveal the truth of something.
See also: away, give, show
Farlex Partner Idioms Dictionary
See also:
  • give the (whole) show away
  • give the game away
  • connive at (something) with (one)
  • whisper about
  • whisper about (someone or something)
  • connive at
  • connive at (something)
  • connive
  • be in cahoots
  • cahoots