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1 definition by baseballguy50

The outcome of eating Mcdonalds the previous day and you feel a very strong bowel movement because of it. Usually occurs from eating any dairy, chicken, or beef products on the menu.
Guy #1: "Oh man I got a severe case of the Mcshits after eating a Mcchicken and Mcdouble from Mcdonalds last night"

Guy#2: "I advise you to use the Mcbathroom"
by baseballguy50 August 07, 2012