When you have the makings of a very large dump pushing into the rectum area, causing tension and potentially a deformation of the area. Similar to the creation of the lava dome on Mt. Saint Helens due to magma pushing to the surface.
Guy 1 - "Hey where you going in such a rush?"
Guy 2 - "I've got a severe lava dome growing here, I'll be back in 15 minutes."
Guy 2 - "I've got a severe lava dome growing here, I'll be back in 15 minutes."
by J November 1, 2004
It is when you give head with a mouth full of hot sauce, causing an immense searing burn to the genital region.
by John Basedow Jr. March 26, 2009