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.
- Annoyingly talkative.
- Given to ranting or bombast.
From mouth +"Ž -y.
- There's enough to go around - Temple is pretty mouthy for a woman with no design training, but then Donna certainly spent a lot of valuable work hours shopping.
- She had been pretty mouthy with him from a distance.
- And I forbid you from killing Toby! He's annoying and mouthy, but he's just a boy. Or an angel or something.