Top Definition
The act of deficating in an explosive manner. This is usually a diahrea dump resembling a volcanic eruption, upside-down.
I just took the worst shit ever. It was an upside-down volcano.
door ruppge 12 november 2007
1 more definition
6 Words related to upside-down volcano
A rather graphic representation of a girl on her period.
Man, that girl was bleeding so heavy it looked like an upside down volcano erupting.
door sullent 2 mei 2011

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