Recieving a messy blumpkin the morning after a night of heavy drinking.
"hey Ben! I woke up this morning to take a heinous dump and your girlfriend gave me a gin runny!"
by Winston esquire October 21, 2010
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The fecal river that cascades down ones legs during a run when no bathroom can be found. Usually the result of a Taco Bell feast or bad cheese. In the event of a runny mitch immediately take off your shoes and throw away your socks as things tend to pool up quickly.
Did you see Bob Blum today on the track, he had such a runny mitch.
by Fleazz March 3, 2017
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Having an incredible case of the squirts and/or trots.

This could be due to an incredible weekend of Binge drinking and fast food, etc
"Ma'am we are out of toilet paper in the room, and I have an incredible case of the Hot Runnies."
by JHR November 9, 2007
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Dude, that gas station hot dog made for one runny deuce.
by gnstrlove January 7, 2016
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Diarrhea. When a lot of shit comes out and it’s both solid and liquid. Usually accompanied by gurgling sounds and a foul stench.
I’m not sure if I should eat that 3rd burrito because I may get the funny runnies.
by JDubs85 May 2, 2018
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A diarrhea like substance that will make you scream and shout until it is all out. It usually last for a day or longer. If it ends up in your pants it is the worst clean up you will ever experience.
Yesterday I couldn't go into work because I had horrible runny shit.
by Piazzaboy25 July 8, 2017
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