WordWeb Online

1. Divulge confidential information or secrets
   "Be careful--his secretary blabs"
   - spill the beans, let the cat out of the bag, talk, tattle, peach, babble, sing, babble out, blab out
    
2. Speak (about unimportant matters) rapidly and incessantly
   - chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, gibber, tattle, blabber, gabble, witter [Brit], rabbit [Brit], yabber [Brit]

Derived forms: blabs, blabbed, blabbing

See also: blabber

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

Encyclopedia: Blab