verb

• (intransitive, informal or UK, dialectal) To talk foolishly; to blather.
  "Personality is what I am aiming at, not mere manners. That is not strong enough for a man who "blithers" as you do."

noun

• (informal or UK, dialectal, uncountable) Foolish or nonsensical talk; blather; (countable) an instance of this.
  "He also knows if the work of the lyric poet be simply "stringin' blithers together, for fools to sing," that a very large percentage of the literary work of the world has been done in vain and this can by no means be admitted."
• (countable, by extension, derogatory, dated) A foolish person; a fool, an idiot.
  "Indeed, it was Mr. Buck's private opinion that in the matter of plants and flowers Sir John and Lady Moulter were "a pair of old blithers.""