adjective
1. unwisely talking too much
• Syn: ↑bigmouthed, ↑blabby, ↑talkative
• Similar to: ↑indiscreet
2. prone to communicate confidential information
• Syn: ↑leaky, ↑talebearing, ↑tattling
• Similar to: ↑communicative, ↑communicatory
Useful english dictionary. 2012.