nincompoop
noun/ˈnɪŋkəmpuːp/
/ˈnɪŋkəmpuːp/
(old-fashioned, informal)- a stupid personWord Originlate 17th cent.: perhaps from the given name Nicholas or from Nicodemus (by association with the Pharisee of this name, and his naive questioning of Christ; compare with French nicodème ‘simpleton’).
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nincompoop