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(southern U.S.A. slang, non derogatory)An african american (male) riding a motorcycle. Black motorcyclist on a budget, usually older model ragged looking cruiser with loud pipes. Don't race one, the smut butt on a putt putt will usually outrun you.
What was that blur that went by with an awful noise? It was a smut butt on a putt putt.
by FIrepig January 17, 2006
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