A severe case of the shits that, upon exit, resembles the sound of a shotgun being fired out of your ass. Usually caused by eating 4 or more dollar menu sandwiches in one sitting from including, but not limited to, McDonalds.
"Ughh I have the McShotguns today."

"What did you do? Eat two McChickens last night?"

"I don't have the McShits."

"Two McChickens and a McDouble??"

"Not the McSplatters either."

"You couldn't possibly have eaten..."

"The McShotguns dude."
by Mike_From_Ohio October 26, 2011

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