have a big mouth
To have a tendency or habit of speaking incessantly, indiscreetly, and/or in a noisy, boorish manner. I can't stand Terry's new husband, he has such a big mouth! It's like no one else gets a chance to speak when he's here. If I'd known you had such a big mouth, I'd have never shared my secret with you! Bobby's always had a big mouth—of course he let it slip that there would be a surprise party for her birthday!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.
have a big mouth
to be a gossiper; to be a person who tells secrets. Mary has a big mouth. She told Bob what I was getting him for his birthday. You shouldn't say things like that about people all the time. Everyone will say you have a big mouth.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
big mouth, have a
Also, have or be a loud mouth . Be loquacious, often noisily or boastfully; be tactless or reveal secrets. For example, After a few drinks, Dick turns into a loud mouth about his accomplishments, or Don't tell Peggy anything confidential; she's known for having a big mouth. [Slang; late 1800s]
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
have a big mouth
tv. to speak loudly and openly in public; to tell secrets. (Have got can replace have.) He has a big mouth. Don’t tell him anything you don’t want everybody else to know.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.