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

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

To punish someone 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) to children. Used as an imperative. Wash your mouth out! What would your mother think if she heard you using that language!
See also: mouth, out, wash
References in periodicals archive ?
Secondly, and this is something I just thought of, it is a lot more difficult to wash someone's mouth out with soap using one of those squirty moisturizing soap dispensers than it was using a fresh bar of Ivory.