In the act of deffication, when the feces or turd hits the water with such immense force to create a splash of cold water that then propels itself onto your buttocks and or butthole. Resulting in an uninvited chill surging through your body sometimes giving you goosebumps and what some would like to call the Shemika shakes.
"It's colder than a Shemika Turd up in here."

"The icy Klondike bar felt like a Shemika Turd in the palm of my hand."

"I had the worst Shemika Turd yesterday."
by Culnickpatnathan January 27, 2009
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