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Definition of big-mouthed adjective from the Oxford Advanced Learner's Dictionary

big-mouthed

adjective
 
/ˈbɪɡ maʊðd/
 
/ˈbɪɡ maʊðd/
(informal)
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  1. talking a lot, especially about yourself, and unable to keep secrets
trait
noun
 
 
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B2
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