facial expression of those caught lying while not accepting resposibility
Despite the charges of corruption, Justin Trudeau again appeared before cameras wearing that shit-eating grin.
by Venetian Blind March 19, 2019
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Said to a person/company/body/instituition plagarises a phrase,joke, idea and uses as their own.
Bruno Mars: "......MTV to teach me how to dougie."

Swag District: Fucking Mars, eat MY shit and get clever.
by balloonus June 6, 2011
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Medical condition where you have an intense urge to take a massive dump in tupperware and put it in the fridge
Eat-my-shit (EMS) Syndrome
by Btwiz March 5, 2012
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A stupid grin that makes you look so clueless that you enjoy eating shit on a daily basis without realising you're a complete putz.
People who call tech support don't even try to learn the basics of using a computer. I picture them sitting at their desk with a shit-eating grin, then headbutting the screen.
by Mikes_arse August 20, 2006
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The grin on a persons face after they just tossed your salad.
by MissBunny October 10, 2003
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