from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Informal A person from the backwoods or a remote mountain area.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Someone who is from the hills; especially from a rural area, with a connotation of a lack of refinement or sophistication.
- n. A white person from the rural southern part of the United States.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a disparaging term for an unsophisticated person
hill + Billy, a nickname for William.(American Heritage® Dictionary of the English Language, Fourth Edition)
From hill + Billy (Wiktionary)