- 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.
mouthy definition by Webster's New World
mouthy definition by American Heritage Dictionary
adjective mouth·i·er, mouth·i·est
- Annoyingly talkative.
- Given to ranting or bombast.
- mouthˈi·ness noun