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2.
1. A fuckin' stupid,ignorant hick.
2. Word play for "hillbilly".
Cletus is one dumb Mountain William.
by staccato brainstem February 14, 2005
 
1.
adj. meaning not a hillbilly or a redneck anymore, yet to me the term itself screams redneck.

Moved past the point of being white-trash hillbilly
"We had gotten end-tables and lamps for our new couch, we were feeling like mountain williams."
by Krucify April 09, 2006