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1.
The type of diarrhoea one gets after having eaten piles of fast food.
"Argh! A McSplurry attack!"
by KHD August 09, 2003
 
2.
The act of taking a crap in a McDonalds toilet.
I'd leave going in there for a while, I've just done a fucking evil McSplurry
by McPhail April 19, 2005