send up a trial balloon
to suggest something and see how people react to it
The company sent up a trial balloon to see how people would react to their new product.

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  • separate but equal
  • separate the men from the boys
  • serve (someone's) purpose
  • serve (someone) right
  • serve as a guinea pig
  • serve notice on (someone)
  • serve time
  • set (someone or something) free
  • set (someone or something) loose
  • set (someone or something) straight
  • Idioms Quiz
  • sands of time
  • come to blows
  • make a name for oneself
  • give (someone) the eye
  • throw good money after bad
  • come home to (someone)
  • make mischief
  • keep up (something)
  • signal to (someone) to do (something)
  • a little bird told me

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    Most of the world's people must walk at least 3 hours to fetch water.      .. More >>
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