The artful yet shocking display of human defecation above waist-height in a public restroom. Usually containing but not limited to Jackson Pollock-esque splatters and/or precariously dangling stalactites.
This occurrence leaves the witness baffled as to the grafeces artist's motivations and technique. Perhaps this is a cathartic release of the soul, a commentary on modern society, or was it simply a burrito that didn't sit well. The sheer height of the markings is what brings about the true mystery.
Also leaves one with the burning question: "How did you get out of the bathroom, and in what state, Artist of the Underground?"
Dude, you need to check out the third stall from the end. There is a stunning display of grafeces. How do you shit on the ceiling?! The CEILING?!?!?!