Particularly violent discharge of near liquid feces into the toilet bowl, resulting in a splattering effect around the rear of said bowl. Flushing will not remove this weld splatter, and it becomes dried on and very difficult to clean later. Sometimes under extreme porcelain welding conditions the tank, or wall behind may be hit by the weld splatter.
"Man Steve did some porcelain welding after dinner, Who's gonna clean that up"
by bunyon December 30, 2006