loosen (one's) tongue

loosen (one's) tongue

To cause one to speak uninhibitedly. Often refers to the effect of alcohol. A few drinks will loosen her tongue, and then I'm sure she'll tell me the secret without me even having to ask. I've never met a reporter like Courtney. She can loosen the tongue of even the cagiest politician.
See also: loosen, tongue
Farlex Dictionary of Idioms.

loosen somebody’s ˈtongue

make somebody talk more freely than usual: A bottle of wine had loosened Harry’s tongue.
See also: loosen, tongue
Farlex Partner Idioms Dictionary

loosen (someone's) tongue

To cause (someone) to speak freely or carelessly or to divulge information.
See also: loosen, tongue
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • loosen
  • loosen somebody's tongue
  • loosen tongue
  • be well turned out
  • be quick on the uptake
  • be thrilled to death
  • be thrilled to pieces
  • be thrilled to bits
  • be up your street
  • (just/right) up (one's) street