"Wolverine State" meaning in English

{
  "etymology_text": "Michigan has a long-standing association with the wolverine: for example, many Detroiters volunteered to fight during the American Civil War and George Armstrong Custer, who led the Michigan Brigade, called them the \"Wolverines\". Perhaps originally from a local trade in wolverine fur, or perhaps suggesting a vicious temper.",
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        "head": "Wolverine State"
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      "expansion": "Wolverine State",
      "name": "en-proper noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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        {
          "kind": "place",
          "langcode": "en",
          "name": "Michigan, USA",
          "orig": "en:Michigan, USA",
          "parents": [
            "United States",
            "North America",
            "America",
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            "Nature",
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        {
          "kind": "place",
          "langcode": "en",
          "name": "State nicknames of the United States",
          "orig": "en:State nicknames of the United States",
          "parents": [
            "United States",
            "North America",
            "America",
            "Earth",
            "Nature",
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      ],
      "glosses": [
        "A nickname for Michigan."
      ],
      "id": "en-Wolverine_State-en-name-I5J-CFbD",
      "links": [
        [
          "Michigan",
          "Michigan#English"
        ]
      ],
      "raw_glosses": [
        "(informal) A nickname for Michigan."
      ],
      "related": [
        {
          "word": "Great Lakes State"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "Wolverine State"
}

{
  "etymology_text": "Michigan has a long-standing association with the wolverine: for example, many Detroiters volunteered to fight during the American Civil War and George Armstrong Custer, who led the Michigan Brigade, called them the \"Wolverines\". Perhaps originally from a local trade in wolverine fur, or perhaps suggesting a vicious temper.",
  "head_templates": [
    {
      "args": {
        "head": "Wolverine State"
      },
      "expansion": "Wolverine State",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "Great Lakes State"
    }
  ],
  "senses": [
    {
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        "English entries with topic categories using raw markup",
        "English informal terms",
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        "English multiword terms",
        "English proper nouns",
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        "English uncountable nouns",
        "en:Michigan, USA",
        "en:State nicknames of the United States"
      ],
      "glosses": [
        "A nickname for Michigan."
      ],
      "links": [
        [
          "Michigan",
          "Michigan#English"
        ]
      ],
      "raw_glosses": [
        "(informal) A nickname for Michigan."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "Wolverine State"
}