moronicism

noun2

1. •
   (informal) The quality of being moronic.

   • A male Beatrice Fairfax, an orgy of moronicism and probably possesses as many listeners within its area as anything else on the air. — 1933
2. •
   (informal) A moronic statement or action.

   • With [Ed] Gardner taking his stance at the prop bar, the “Tavern” stooges are given their successive licks at bandying their trademarked insults, malapropisms and moronicisms. — 1948