Wiktionary
potty-mouthed
a. (context informal English) Having the characteristic of regularly using vulgar language, especially strong profanity. alt. (context informal English) Having the characteristic of regularly using vulgar language, especially strong profanity.
Usage examples of "potty-mouthed".
If she couldn't say out loud all those four-letter words, how was she supposed to relay the message from the potty-mouthed man in Las Vegas?