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Conjunctive slang that combines doofus and hillbilly. A foolish or inept person from a backwoods or other remote area, esp. from the mountains of the southern U.S. Also spelled dufubilly, dufabilly, and doofabilly.
Shouting out "You Lie!" made you look like a total doofubilly.
by Mark L Stevens September 24, 2009
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