Similar words: profuse, goof up, profusely, profusion, from door to door, biofuel, profundity, doom. Meaning: n. a stupid incompetent person.
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1. Hurry up, doofus. I don't have all day.
2. You probably thought, "What kind of doofus can't add a few numbers without moving his mouth?"
3. Remember that obama chose this doofus, so what does that make obama? A doofus leading a doofus.
4. I was the doofus that got stuck in the men's room.
5. She would be so miserable tagging along after this insensitive doofus.