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To be exceptionally smug, full of oneself.
after that gummer i had a shit eating grin
by butthead April 29, 2006
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Also refered to as an eater of Dung - the uncontrolable urge to snack on dung or feces by Amberang or close associate.
No Know examples as Amberang is a very seceretive shit eating person and hides her habit well
by Rexy Loo May 26, 2006
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