Noun: The combination of the solid waste and gas excreted from the anus simultaneously.
Verb: The act of excreting shit and gas while farting!
The origin of the word "shart" is credited to L. Crowley (1986) after observing her brother excrete a little extra something along with his explosive gas after after a night of endulgence at the turkey testical festival.
Holy Crap! The idiot just sharted!