Source : Webster's Revised Unabridged Dictionary (1913)

Blabber \Blab"ber\, n.
   A tattler; a telltale.

Source : WordNet®

blabber
     n : one who reveals confidential information in return for money
         [syn: {informer}, {betrayer}, {rat}, {squealer}]
     v : speak (about unimportant matters) rapidly and incessantly
         [syn: {chatter}, {piffle}, {palaver}, {prate}, {tittle-tattle},
          {twaddle}, {clack}, {maunder}, {prattle}, {blab}, {gibber},
          {tattle}, {gabble}]