"shit-eating grin" meaning in English

{
  "etymology_text": "Possibly from a contraction of \"grinning like a ’possum eating 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\").",
  "forms": [
    {
      "form": "shit-eating grins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "shit-eating grin (plural shit-eating grins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Facial expressions",
          "orig": "en:Facial expressions",
          "parents": [
            "Face",
            "Nonverbal communication",
            "Head and neck",
            "Communication",
            "Body parts",
            "All topics",
            "Body",
            "Anatomy",
            "Fundamental",
            "Human",
            "Biology",
            "Medicine",
            "Sciences"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2006, Ted Bell, Spy: A Thriller, page 29",
          "text": "He was at the wheel of his brand-new 1965 GTO, top down, wearing a super-sized shit-eating grin on his face. ",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A broad smile indicating self-awareness that may suggest self-satisfaction, smugness, discomfort, or embarrassment."
      ],
      "id": "en-shit-eating_grin-en-noun-B90knFGL",
      "links": [
        [
          "smile",
          "smile"
        ],
        [
          "self-awareness",
          "self-awareness"
        ],
        [
          "self-satisfaction",
          "self-satisfaction"
        ],
        [
          "smugness",
          "smugness"
        ],
        [
          "discomfort",
          "discomfort"
        ],
        [
          "embarrassment",
          "embarrassment"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, vulgar) A broad smile indicating self-awareness that may suggest self-satisfaction, smugness, discomfort, or embarrassment."
      ],
      "synonyms": [
        {
          "tags": [
            "rare"
          ],
          "word": "coprophagous grin"
        },
        {
          "word": "fish-eating grin"
        },
        {
          "word": "smirk"
        },
        {
          "word": "simper"
        }
      ],
      "tags": [
        "idiomatic",
        "vulgar"
      ],
      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "broad smile of smugness",
          "tags": [
            "masculine"
          ],
          "word": "rictus jubilatoire"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "broad smile of smugness",
          "tags": [
            "masculine"
          ],
          "word": "sourire de faux-cul"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "doyagao",
          "sense": "broad smile of smugness",
          "word": "ドヤ顔"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "broad smile of embarrassment",
          "tags": [
            "masculine"
          ],
          "word": "sourire à manger de la merde"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-shit-eating grin.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/0f/En-au-shit-eating_grin.ogg/En-au-shit-eating_grin.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/0f/En-au-shit-eating_grin.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "shit-eating grin"
}

{
  "etymology_text": "Possibly from a contraction of \"grinning like a ’possum eating 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\").",
  "forms": [
    {
      "form": "shit-eating grins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "shit-eating grin (plural shit-eating grins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "English vulgarities",
        "en:Facial expressions"
      ],
      "examples": [
        {
          "ref": "2006, Ted Bell, Spy: A Thriller, page 29",
          "text": "He was at the wheel of his brand-new 1965 GTO, top down, wearing a super-sized shit-eating grin on his face. ",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A broad smile indicating self-awareness that may suggest self-satisfaction, smugness, discomfort, or embarrassment."
      ],
      "links": [
        [
          "smile",
          "smile"
        ],
        [
          "self-awareness",
          "self-awareness"
        ],
        [
          "self-satisfaction",
          "self-satisfaction"
        ],
        [
          "smugness",
          "smugness"
        ],
        [
          "discomfort",
          "discomfort"
        ],
        [
          "embarrassment",
          "embarrassment"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, vulgar) A broad smile indicating self-awareness that may suggest self-satisfaction, smugness, discomfort, or embarrassment."
      ],
      "tags": [
        "idiomatic",
        "vulgar"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-shit-eating grin.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/0/0f/En-au-shit-eating_grin.ogg/En-au-shit-eating_grin.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/0/0f/En-au-shit-eating_grin.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "tags": [
        "rare"
      ],
      "word": "coprophagous grin"
    },
    {
      "word": "fish-eating grin"
    },
    {
      "word": "smirk"
    },
    {
      "word": "simper"
    }
  ],
  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "broad smile of smugness",
      "tags": [
        "masculine"
      ],
      "word": "rictus jubilatoire"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "broad smile of smugness",
      "tags": [
        "masculine"
      ],
      "word": "sourire de faux-cul"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "doyagao",
      "sense": "broad smile of smugness",
      "word": "ドヤ顔"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "broad smile of embarrassment",
      "tags": [
        "masculine"
      ],
      "word": "sourire à manger de la merde"
    }
  ],
  "word": "shit-eating grin"
}