cotton-headed ninny-muggins

== English == === Etymology === From cotton-headed +‎ ninny (“fool”) +‎ muggins (“gullible person”); implied to be part of the Christmas elf dialect from the North Pole; originally from the Christmas film Elf (2003). === Noun === cotton-headed ninny-muggins (plural not attested) (informal, humorous) A whimsical insult meaning silly fool or simpleton.