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Enterance of a thumb into the rectal area of another individual. Also refered to as a "Henry Stinkler".
Mallory was shocked and upset when Nick incorporated the idea of a dirty Fonzzi into their moment of affection.
by dave o March 11, 2004
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Jul 29 Word of the Day
Someone who used to be a potential girlfriend/boyfriend, but no longer is.
Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...
by brownsuite September 24, 2011
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