English

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Etymology

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Possibly from a contraction of "grinning like a ’possum eating shit"[1](compare alsohappy as a pig in shit); later detached from meaning and persisting due to its vividness (cf. "there are many ways to skin a cat"or"happy as a clam").

Pronunciation

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Noun

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shit-eatinggrin(pluralshit-eating grins)

  1. (idiomatic,vulgar)A broadsmileindicatingself-awarenessthat may suggestself-satisfaction,smugness,discomfort,orembarrassment.
    Synonyms:coprophagous grin(rare),fish-eating grin(expurgated),simper
    Near-synonym:smirk
    • 2006,Ted Bell,Spy: A Thriller,→ISBN,page29:
      He was at the wheel of his brand-new 1965 GTO, top down, wearing a super-sizedshit-eating grinon his face. 

Usage notes

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The term is ambiguous and may indicate either a genuine broad smile (e.g. smug happiness) or a fake broad smile (e.g. trying to hide or get away with something).

Quotations

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Translations

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References

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  • Oxford English Dictionary,2nd ed., 1989.