(N): a person who sharts in a way that creates a piece of splatter art, usually on a toilet seat or wall, often but not always on purpose.
Man, that is a lot of shit on that toilet seat, the pattern is mesmerizing though, that shartist is a Picasso!
Somebody who can detect a shart before it soils their undergarments, thus a avoid shower and other emergency response.
I am always cautious when opening the floodgate for pressure equalization. Over several years, I have developed the wisdom and control of a shartist to avoid unexpected moments of impurity.