blathering
1. [ adjective ] talking idly or incoherently
Synonyms: babbling gabbling jabbering blithering
Examples:

"blithering (or blathering) idiot" "jabbering children" "gabbling housewives" "a babbling hospital inmate"

Related terms: voluble
Similar spelling:   blithering
  blather
  blither
  blether
  blotter
  bloater
  Blatter
  blatherskite
  Blattaria
  bluethroat