doofus

Or du·fus

[doo-fuhs]

noun

plural

doofuses 

1. Slang.,  a foolish or inept person.

doofus

/ ˈduːfəs /

noun

1. informal,  a slow-witted or stupid person

Word History and Origins

Origin of doofus¹

An Americanism daing back to 1960–65; probably alteration of earlier goofus in same sense

Word History and Origins

Origin of doofus¹

C20: from Black slang