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Verb: blab out
Usage: informal
  1. Divulge confidential information or secrets
    - spill the beans, let the cat out of the bag, talk, tattle, blab [informal], peach [informal], babble, sing [informal], babble out, give the game away

Derived forms: blabs out, blabbing out, blabbed out

Type of: break, bring out, disclose, discover, divulge, expose, give away, lay bare, let on, let out, reveal, uncover, unwrap