'Blabber' definitions:

Definition of 'blabber'

From: WordNet
noun
One who reveals confidential information in return for money [syn: informer, betrayer, rat, squealer, blabber]
verb
Speak (about unimportant matters) rapidly and incessantly [syn: chatter, piffle, palaver, prate, tittle- tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabble]

Definition of 'Blabber'

From: GCIDE
  • Blabber \Blab"ber\, n. one who blabr; a tattler; a telltale.
  • Syn: blabbermouth. [1913 Webster]