Origin: Americanism; after speech in 16th Congress, 1819–21, by F. Walker, who said he was bound to speak for Buncombe (N.C. county in district he represented)
n. nonsense. : That's just plain bunkum! , Your Honor, counselor's airbrained buncombe is an insult to the court. I object!
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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