Talkative, loud, or indiscreet; prone to talking too much or revealing secrets.
Compound adjective from 'big' and 'mouthed,' describing a person with a literal or figurative big mouth who talks excessively.
This word is fascinating because it uses a physical feature to describe a personality trait—'big mouth' for a talkative person appears in many languages and cultures, suggesting we universally associate mouth size with chattiness.
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