When you go into a fast food restaurant just to use the toilets, not to buy the food.
by JUICEBOXXX July 27, 2007
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Don't go to McShit, come on down to BK.
by Sabre Z September 18, 2004
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The substance that exits one's arse a few hours after eating McDonalds. Think 'McFlurry', imagine it brown in colour, with the same texture but different ingredients and that is the McShit.
"I'm gonna regret eating that McDonalds later, when i have a McShit."
by Mark Standing July 7, 2006
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The act of having a diarrhea reaction, due to the ingestion of any of McDonalds restaraunt's choices of foods.
I ate a Big Mac for lunch and now i have the McShits.
by Ronald April 23, 2004
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An agressive shit-shake in the toilet after going on a McBinge. Will generally have the bathroom smelling of a Happy Meal when finished.
*Group of girls head to the ladies room to touch up their make-up*

First girl: Omg it smells like McDonald's in here!
Second girl: Sorry, I took a McShit a few minutes ago...
Third girl: Ew!!... disgusting.
by Cun-Tea July 29, 2022
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It's when you eat way too much fast food, probably McDonald's, and you get the runs.
Yo man, I got the McShits today from eating all that McDonald's.
by GET CRACKALACKIN' May 31, 2005
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When you have diarrhea after you eat fast food, mostly from McDonalds.
Boy, did I have the McShits last night.
by piercemandawg May 15, 2007
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