It is the combination of a shart and shawty. A shart is a type of bodily function where a human shits (defecation) and farts at the same time. It is an aggressive but somewhat relieving feeling for humans that are constipated. A shawty is a bad bitch. Therefore, a sharty is a bad bitch with serious tummy issues.
Hey sharty, you're a feral rat. I like that.
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