1. Divulge confidential information or secrets
   "Be careful—his secretary blabs"; "She blabbed out the surprise party plans";
   - spill the beans [informal], let the cat out of the bag, talk, tattle, peach [informal], babble, sing [informal], babble out, blab out [informal], give the game away
    
2. Speak (about unimportant matters) rapidly and incessantly
   "The old man blabbed on about the weather";
   - chatter, piffle [informal], palaver [informal], prate, tittle-tattle, twaddle [informal], clack [informal], maunder, prattle, gibber, tattle, blabber [informal], gabble, vapour [Brit, Cdn], vapor [US], rabbit [Brit, informal], jibber-jabber, witter [Brit, informal], twattle [UK, dialect], yatter [Brit, informal], yabber [informal]

Derived forms: blabbed, blabs, blabbing

Type of: break, bring out, disclose, discover, divulge, expose, give away, lay bare, let on, let out, mouth, reveal, speak, talk, uncover, unwrap, utter, verbalise [Brit], verbalize

Encyclopedia: Blab