"fat innkeeper" meaning in English

{
  "etymology_text": "So called from its shape and the fact that its tunnels often contain other animals.",
  "forms": [
    {
      "form": "fat innkeepers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fat innkeeper (plural fat innkeepers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Annelids",
          "orig": "en:Annelids",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Urechis caupo, a kind of spoonworm."
      ],
      "id": "en-fat_innkeeper-en-noun-Fyr-~onq",
      "links": [
        [
          "spoonworm",
          "spoonworm"
        ]
      ]
    }
  ],
  "word": "fat innkeeper"
}

{
  "etymology_text": "So called from its shape and the fact that its tunnels often contain other animals.",
  "forms": [
    {
      "form": "fat innkeepers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fat innkeeper (plural fat innkeepers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Entries using missing taxonomic name (species)",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Annelids"
      ],
      "glosses": [
        "Urechis caupo, a kind of spoonworm."
      ],
      "links": [
        [
          "spoonworm",
          "spoonworm"
        ]
      ]
    }
  ],
  "word": "fat innkeeper"
}