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a serious condition in which a guy has spent so much time with an ugly girl ... that he actually begins to find her attractive. Typically occurring in the work place, there is only one known cure for cabin beaver... And it ain't pretty.
Ricky: There is that hot chick I work with. Man I want to bang her so bad!

Art: Her? Dude, you got a serious case of Cabin Beaver.
by FTWk January 17, 2012
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