A slang term for diarrohea, derived from the word "chunder" meaning to vomit.
"Why did you bumchunder in my room!"

"That food made me bumchunder"
by MOLOTOV1010 September 2, 2009
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A Bumchunder is any anal excretion that looks remarkably like a type of food. Usually peanuts, sweetcorn, carrots etc

However depite the aforementioned bumchunder looking like food, it is inadvisable to consume bumchunder, as this action may result in "Mouthpoo", or actual chunder if you prefer.
It looked like sweetcorn glued together with chocolate, it was a total bumchunder!!
by Pedro Mendez November 8, 2010
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