noun, plural du·fus·es.
noun, plural doo·fus·es.
- Slang. a foolish or inept person.
noun
- informal, mainly US a slow-witted or stupid person
see doofus.
student slang, “dolt, idiot, nerd,” by 1960s. “Dictionary of American Slang” says “probably related to doo-doo and goofus.”