dufus dufus /ˈduːfʌs/

noun

1. [Informal, N. American] A stupid incompetent person  ( dimwit [Informal] , doofus [Informal, N. American] , half-wit [Informal] , nitwit [Informal] , dufus [Informal, N. American] , numpty [Informal, UK] , simp [Informal, N. American] )
   a stupid incompetent person