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.
ayon kay ruppge ika-12 ng Nobyembre, 2007
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.
ayon kay sullent ika-02 ng Mayo, 2011