A sickness you get from eating bad food, or just being ugly.

When you get Shartosis you experience bad gas and diarrhea at the same time over and over, most times the sharts are projectile and get all over the place. And sometimes it take days for the sharting to stop.
"Dude last summer at our family barbecue my uncle got Shartosis."

"Dude last time I got Shartosis I slept in the bath tub for 2 days."
by laqueefaorangejuice August 15, 2009
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