by just a little guy July 30, 2024

A sex activity where you shit in the bottoms ass and wait for their body heat to make it boil thus making it flow out like a volcano.
by Jimmy Boobs April 24, 2024

When you are so fat that the skin around the base of your shaft becomes so plump that it starts to engulf your dick.
by ggnoodles July 23, 2018

by AdamDangerX April 21, 2016

The best part of hibachi when the chef makes a small stack of raw onion rings, puts vegetable oil in it, and lights it on fire whilst it expels steam and flames, like a volcano. (Hence the name).
Them: how was the hibachi dinner last night?
You: it was great, except I missed the onion volcano while I was in the restroom.
Them: aw man, that’s the best part!
You: it was great, except I missed the onion volcano while I was in the restroom.
Them: aw man, that’s the best part!
by Bandgeek2003 December 26, 2019

To masterbait while holding in a piss, meaning when you bust the piss leaks down your dick like hot lava
by Amcgirr February 11, 2025
