blithering
From Longman Dictionary of Contemporary Englishblitheringblith‧er‧ing /ˈblɪðərɪŋ/ adjective → blithering idiotExamples from the Corpusblithering• Today provides a more immediate issue- the final opportunity for cricket to show it's not administered entirely by blithering idiots.Origin blithering (1800-1900) blither “to talk nonsense” ((19-20 centuries)), from blather