blabbermouthed

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. unwisely talking too much
• Syn:
bigmouthed, blabby, talkative
• Similar to:
indiscreet
• Derivationally related forms:
talkativeness (for: talkative), talk (for: talkative)
2. prone to communicate confidential information
• Syn:
leaky, talebearing, tattling
• Similar to:
communicative, communicatory
• Derivationally related forms:
leak (for: leaky)