Definition of mouthy adjective from the Oxford Advanced Learner's Dictionary

 

mouthy

 adjective
adjective
BrE BrE//ˈmaʊθi//
 
; NAmE NAmE//ˈmaʊθi//
 
; BrE BrE//ˈmaʊði//
 
; NAmE NAmE//ˈmaʊði//
 
(informal, disapproving) Describing unpleasant traits
 
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used to describe a person who talks a lot, sometimes expressing their opinions strongly and in a rude way mouthy teenagers See related entries: Describing unpleasant traits
See the Oxford Advanced American Dictionary entry: mouthy