wash your mouth out

wash (one's) mouth out (with soap)

To punish one for using rude, vulgar, or obscene language by cleaning their mouth with soap (usually used merely as a threat). If you kids don't stop cussing in this house, I'm going to wash your mouths out with soap!
See also: mouth, out, wash

wash your mouth out

An admonishment for using profanity. Used especially by parents (or other adults) as a figurative imperative to children. Wash your mouth out! What would your mother think if she heard you using that language!
See also: mouth, out, wash
Farlex Dictionary of Idioms.
See also:
  • wash (one's) mouth out (with soap)
  • rinse (one's) mouth out (with soap)
  • rinse mouth out
  • (Do) you eat with that mouth?
  • (Do) you kiss your grandmother with that mouth?
  • (Do) you kiss your granny with that mouth?
  • (Do) you kiss your mama with that mouth?
  • (Do) you kiss your momma with that mouth?
  • cuss like a sailor
  • be off-color