a sexual act in which one partner is upside (via handstand or being held upside down by another) and projectile diarrheas in the air, like a volcano erupting, while the other partner awaits below to have the diarrhea rain upon them like hot lava
damn, that nasty hoe tried to get me to go volcanoing with her last night, disgusting!
by damnthtsnazty July 27, 2011
The name given to the occasion when, for whatever reason, your beverage fizzes or froths over the top of it's container.
"Dude, my beer is volcanoing!"
by CamiKaze July 10, 2007