n. Informal
One given to loud, irritating, or indiscreet talk.
loudmouthed loud'mouthed' (-mouTHd', -moutht') adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
