"riverboat queen" meaning in English

{
  "forms": [
    {
      "form": "riverboat queens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "riverboat queen (plural riverboat queens)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1968, John Fogerty (lyrics and music), “Proud Mary”",
          "text": "I never saw the good side of a city until I hitched a ride on a riverboat queen.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large paddle steamer operating on the Mississippi river."
      ],
      "id": "en-riverboat_queen-en-noun-NRFrmxoF",
      "links": [
        [
          "paddle steamer",
          "paddle steamer"
        ],
        [
          "Mississippi",
          "Mississippi"
        ]
      ],
      "raw_glosses": [
        "(US) A large paddle steamer operating on the Mississippi river."
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "riverboat queen"
}

{
  "forms": [
    {
      "form": "riverboat queens",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "riverboat queen (plural riverboat queens)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1968, John Fogerty (lyrics and music), “Proud Mary”",
          "text": "I never saw the good side of a city until I hitched a ride on a riverboat queen.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A large paddle steamer operating on the Mississippi river."
      ],
      "links": [
        [
          "paddle steamer",
          "paddle steamer"
        ],
        [
          "Mississippi",
          "Mississippi"
        ]
      ],
      "raw_glosses": [
        "(US) A large paddle steamer operating on the Mississippi river."
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "riverboat queen"
}