- The definition of mouthy is someone who speaks a lot, especially someone who is rude.
A kid who talks back all the time is an example of a kid who would be described asmouthy.
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
adjective mouth·i·er, mouth·i·est
- Annoyingly talkative.
- Given to ranting or bombast.
- mouthˈi·ness noun