"belly bag" meaning in English

{
  "forms": [
    {
      "form": "belly bags",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "belly bag (plural belly bags)",
      "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"
        },
        {
          "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": "Bags",
          "orig": "en:Bags",
          "parents": [
            "Containers",
            "Tools",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "fanny pack; bum bag"
      ],
      "id": "en-belly_bag-en-noun-EcBkibAM",
      "links": [
        [
          "fanny pack",
          "fanny pack"
        ],
        [
          "bum bag",
          "bum bag"
        ]
      ],
      "raw_glosses": [
        "(US) fanny pack; bum bag"
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "belly bag"
}

{
  "forms": [
    {
      "form": "belly bags",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "belly bag (plural belly bags)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "American English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Bags"
      ],
      "glosses": [
        "fanny pack; bum bag"
      ],
      "links": [
        [
          "fanny pack",
          "fanny pack"
        ],
        [
          "bum bag",
          "bum bag"
        ]
      ],
      "raw_glosses": [
        "(US) fanny pack; bum bag"
      ],
      "tags": [
        "US"
      ]
    }
  ],
  "word": "belly bag"
}