What is the origin of the phrase shit eating grin? How did it come to mean showing smugness or self-satisfaction of an individual's actions?
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From the Urban Dictionary:
There have been similar expressions used quite far back:
Although, its origin is undetermined, they may have been incidents which caused the invention of this phrase. Below is an excerpt:
From what I understand, dogs would often follow horse-drawn wagons and eat the horse droppings. The taste caused the dogs to raise their heads and pull their mouths back in a sort of grin.
protected by tchrist Oct 5 '12 at 21:55
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