"Unidentified Skinny Dipping Duffman" is a possibly fictional Duffman.
According to Homer Simpson, the unidentified Duffman was once skinny dipping with him. When the Duffman asked Homer if he had any beer, he replied that he didn't. The Duffman then claims drowning makes you feel like you are drunk, and proceeds to kill himself. Homer eventually find Duffman's keys to the Duff Brewery. But according to Homer, he may have just made up the story and found the key on the floor.
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