1. The use, or tendency to use, obscene, vulgar, or profane language. Sometimes hyphenated. You might think that sort of trash-mouth is acceptable when you're with your friends, but you can stow it while you're under our roof, got it? My dad used to swear a blue streak all the time when I was a kid, so I developed a bit of a trash mouth as a result.
2. A person who uses such obscene, vulgar, or profane language. Sometimes hyphenated. He's actually a very intelligent guy, but he's such a trash mouth that he's hard to take seriously. We can't have a trash-mouth like that running our presentations.
3. The use, or tendency to use, disparaging, insulting, or abusive language. Sometimes hyphenated. The boxer is renowned for having quite a trash-mouth whenever he's face-to-face with his opponents before a match.
4. A person who uses such disparaging, insulting, or abusive language. Sometimes hyphenated. These politicians always turn into such trash mouths during their election campaigns.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. someone who uses obscene language. Some “trash mouth” is making everybody mad over in the park.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.