Adjective blabbermouthed has 2 senses
  1. bigmouthed, blabbermouthed, blabby, talkative - unwisely talking too much
    Antonym: discreet (indirect, via indiscreet)
  2. blabbermouthed, leaky, talebearing, tattling - prone to communicate confidential information
    Antonyms: uncommunicative, incommunicative (indirect, via communicative)
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