look up any word, like cunt:
 
1.
millbilly, a slang defenition used for a person born and raised in marstons mills mass. with many generations of millbillys in you familly before you.
look at that kid driving that half chevy ford truck who the hell would drive that peice of sh*t? I dont know must be a millbilly
by rich henry April 26, 2008
 
2.
a person that is very dorky and lives in a town or place that is or starts with mill
first person:hey you see the dork from millborn? second person: oh that millbilly?
by Wa`nna-j July 05, 2009
 
3.
person from Boone's Mill, Virgina.
"So are you living in Salem or Vinton, or are you a millbilly?"
by mich July 19, 2004