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doofus

American  
[doo-fuhs] / ˈdu fəs /
Or dufus

noun

plural

doofuses

  1. Slang. a foolish or inept person.

doofus British  
/ ˈduːfəs /

noun

  1. informal a slow-witted or stupid person

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of doofus

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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.