from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Slang An incompetent, foolish, or stupid person.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A person with poor judgment and taste
from the GNU version of the Collaborative International Dictionary of English
- n. a person who is stupid or inept; -- used contemptuously.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a stupid incompetent person
Perhaps blend of doof, fool (from Scots) and goofus, fool (from goof).(American Heritage® Dictionary of the English Language, Fourth Edition)
From German doof ("stupid"); related to dolt. (Wiktionary)