Never heard of "butt naked" before. Always only heard the term as "buck naked". One theory proposes the original phrase was actually "butt naked." The phrase was then cleaned up to "buck naked" so it could be used in polite company. The word "buck" in this sense is an adverb meaning "stark" or "completely."

Last edited by Bazr; 07/26/2009 11:19 PM.
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