verb (used without object)

  1. to talk foolishly; blather: He’s blithering about some problem of his.


  1. talking foolishly; jabbering
  2. informal stupid; foolishyou blithering idiot

1880, present participle adjective (from the first typically with idiot) from blither (v.) “to talk nonsense.” From 1872 as a verbal noun.


1868, variant of blether “talk nonsense,” 1520s, a northern British and Scottish word, from Middle English blather (see blather (v.)). Related: Blithered; blithering.

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