Also found in: Thesaurus.
1. Slang Speaking loudly or indiscreetly; loudmouthed.
2. Having a large mouth.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. very talkative; indiscreet; loudmouthed.
2. having a very large mouth.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.