Akademik

blabbermouthed
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)

Useful english dictionary. 2012.