Top Definition
When two or more used bars of soap meld together in the shower or soap dish, creating one grotesque, misshapen bar. You'll use it, but you won't like it.
After two months, the three used bars in the soap dish finally melted together and became a Frankensoap. It's aliiiiiiiiiivvvvve!
by bluegrassg8r July 27, 2013

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