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finger fungus 

A wedding ring on one's finger making them unavailable for dating.
Jane: Wow, look at that hottie over there!
Sue: Yeah, he is sexy, ohhhh but he has finger fungus.
Jane: Damn!
finger fungus by sarahmaine April 16, 2008

crusty finger fungus butt

school yard taunt. Denotes the person is icky
"that Tommy is a crusty finger fungus butt"