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Definition of blabbermouth noun from the Oxford Advanced Learner's Dictionary

blabbermouth

noun
 
/ˈblæbəmaʊθ/
 
/ˈblæbərmaʊθ/
(informal, disapproving)
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  1. a person who tells secrets because they talk too much
See blabbermouth in the Oxford Advanced American Dictionary
trait
noun
 
 
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