"FNDM" meaning in English

{
  "etymology_text": "From fandom. The spelling in capital letters is based on the characters' practice of using the first letters of their names for their teams, like \"RWBY\" and \"JNPR\".",
  "head_templates": [
    {
      "args": {},
      "expansion": "FNDM",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fans (people)",
          "orig": "en:Fans (people)",
          "parents": [
            "Fandom",
            "People",
            "Culture",
            "Human",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "the fans of the American online animated series RWBY."
      ],
      "id": "en-FNDM-en-name-Pmw8RBNl",
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "fan",
          "fan"
        ]
      ],
      "raw_glosses": [
        "(Internet slang) the fans of the American online animated series RWBY."
      ],
      "tags": [
        "Internet"
      ],
      "wikipedia": [
        "RWBY"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfændəm/"
    }
  ],
  "word": "FNDM"
}

{
  "etymology_text": "From fandom. The spelling in capital letters is based on the characters' practice of using the first letters of their names for their teams, like \"RWBY\" and \"JNPR\".",
  "head_templates": [
    {
      "args": {},
      "expansion": "FNDM",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English internet slang",
        "English lemmas",
        "English proper nouns",
        "English uncountable nouns",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Fans (people)"
      ],
      "glosses": [
        "the fans of the American online animated series RWBY."
      ],
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "fan",
          "fan"
        ]
      ],
      "raw_glosses": [
        "(Internet slang) the fans of the American online animated series RWBY."
      ],
      "tags": [
        "Internet"
      ],
      "wikipedia": [
        "RWBY"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈfændəm/"
    }
  ],
  "word": "FNDM"
}