"FOOF" meaning in English

{
  "etymology_text": "Onomatopoeic (see foof), in reference to its explosive properties, and as a play on its chemical structure (F = fluorine, O = oxygen).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "FOOF (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "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": "Chemistry",
          "orig": "en:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "dioxygen difluoride"
      ],
      "id": "en-FOOF-en-noun-BJEk69FT",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "dioxygen difluoride",
          "dioxygen difluoride"
        ]
      ],
      "raw_glosses": [
        "(chemistry, informal) dioxygen difluoride"
      ],
      "tags": [
        "informal",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "FOOF"
}

{
  "etymology_text": "Onomatopoeic (see foof), in reference to its explosive properties, and as a play on its chemical structure (F = fluorine, O = oxygen).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "FOOF (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English nouns",
        "English palindromes",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Chemistry"
      ],
      "glosses": [
        "dioxygen difluoride"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "dioxygen difluoride",
          "dioxygen difluoride"
        ]
      ],
      "raw_glosses": [
        "(chemistry, informal) dioxygen difluoride"
      ],
      "tags": [
        "informal",
        "uncountable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "FOOF"
}