blithering idiot(redirected from blither)
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A senseless babbler. This term owes its origin to the Scots dialect verb to blether, meaning to talk nonsense, with blither being a variant spelling. Combining it with “idiot” began in the late 1800s. It appeared in the British humor magazine Punch in 1889: “I’ll state pretty clearly that his son is a blithering idiot.”
See also: idiot