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Noun: blabber  blabu(r)
  1. One who reveals confidential information to the police or other authority
    - informer, betrayer, rat, squealer
Verb: blabber  blabu(r)
  1. Speak (about unimportant matters) rapidly and incessantly
    - chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, gabble, rabbit [Brit], witter [Brit], yabber [Brit]

Derived forms: blabbers, blabbering, blabbered

See also: blab

Type of: informant, mouth, source, speak, talk, utter, verbalise [Brit], verbalize