Top Definition
From the historical account of the St. Louis Cardinals outfielder, Chris Duncan, who makes it a habit of having anal sex and then spinning the girl around to ejaculate in her face.
That girl that I hooked up with last night was dirty, so I gave her The Duncan. She used my bath towel to wipe of her face.
by Bachass October 29, 2006
A nickname for a family of very similar looking people that have possibly inbred.
Phillip: "Did you see them?"
Average Joe: "Yeah they all looked the same!"
Phillip: "The Duncans or what?!"
by Philpac September 10, 2008

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