Wiktionary
potty mouth
alt. 1 (context idiomatic euphemistic English) The characteristic of regularly using vulgar language, especially strong profanity. 2 (context idiomatic English) A person having this characteristic. n. 1 (context idiomatic euphemistic English) The characteristic of regularly using vulgar language, especially strong profanity. 2 (context idiomatic English) A person having this characteristic.