The are so into and proud of themselves that if they were to shit right now, they would eat it.
A smile where the person is so full of it that you want them to “eat shit” (you hate it)
According to this source via wiktionary, it’s ‘[p]ossibly from a contraction of “grinning like a ’possum eating shit.”’
I figured it came from a similar expression like “happier than a pig in shit” implying the person is happy about something they really shouldn’t be happy about.
Hm that kinda makes some sense. I have to wonder who ever saw a possum do that though. They aren’t much for being seen :)
According to urbandictionary, if someone is shit eating, it means “To be exceptionally smug, full of oneself.”
I guess, it’s a type of grin that makes someone assume the person is like that.
I know what it means. I don’t know what it has to do with consuming feces.
