n. a person who talks dirty. (See also bad-mouth.) : Some dirty-mouth yelled out the most obscene things during the meeting.
tv. to speak ill of someone or something. (See also bad-mouth.) : Please stop dirty-mouthing my friends.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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