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This is an experience where one farts, accidentally releasing feces into one's undergarments, (see also: Shart) and as a result of this, they are so disgusted by their own "shart" that they vomit.
Shaine: "Man Jarrett sharted so hard that it made him vomit. He totally just shamited!!"

Barry: "Yeah I think I almost shamited last night, but I didn't shart so it wasn't too bad."
by pseudoshaine August 15, 2008

Words related to Shamit

bodily function fart flatulence shart vomit