To be exceptionally smug, full of oneself.
after that gummer i had a shit eating grin
by butthead April 29, 2006
when one proceeds to eat ones own shit.
hey man you shit-eating today?
by crazy eyes0327! February 22, 2012
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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