"lucky duck" meaning in English

{
  "forms": [
    {
      "form": "lucky ducks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lucky duck (plural lucky ducks)",
      "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": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Someone with astounding good luck."
      ],
      "id": "en-lucky_duck-en-noun-vop025a0",
      "links": [
        [
          "Someone",
          "someone"
        ],
        [
          "astounding",
          "astounding"
        ],
        [
          "good luck",
          "good luck"
        ]
      ],
      "raw_glosses": [
        "(informal) Someone with astounding good luck."
      ],
      "synonyms": [
        {
          "word": "lucky dog"
        },
        {
          "word": "lucky devil"
        },
        {
          "word": "lucky duckling"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "lucky duck"
}

{
  "forms": [
    {
      "form": "lucky ducks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "lucky duck (plural lucky ducks)",
      "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 informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:People"
      ],
      "glosses": [
        "Someone with astounding good luck."
      ],
      "links": [
        [
          "Someone",
          "someone"
        ],
        [
          "astounding",
          "astounding"
        ],
        [
          "good luck",
          "good luck"
        ]
      ],
      "raw_glosses": [
        "(informal) Someone with astounding good luck."
      ],
      "synonyms": [
        {
          "word": "lucky dog"
        },
        {
          "word": "lucky devil"
        },
        {
          "word": "lucky duckling"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "lucky duck"
}