"marshmallow fluff" meaning in English

{
  "etymology_text": "From a US brand name.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "marshmallow fluff (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": "English genericized trademarks",
          "parents": [
            "Genericized trademarks",
            "Terms by etymology",
            "Trademarks",
            "Terms by usage"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "New England English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Marshmallow creme."
      ],
      "id": "en-marshmallow_fluff-en-noun-OAs1jRSd",
      "links": [
        [
          "Marshmallow creme",
          "marshmallow creme"
        ]
      ],
      "raw_glosses": [
        "(New England) Marshmallow creme."
      ],
      "tags": [
        "New-England",
        "uncountable"
      ]
    }
  ],
  "word": "marshmallow fluff"
}

{
  "etymology_text": "From a US brand name.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "marshmallow fluff (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English genericized trademarks",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "New England English",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "Marshmallow creme."
      ],
      "links": [
        [
          "Marshmallow creme",
          "marshmallow creme"
        ]
      ],
      "raw_glosses": [
        "(New England) Marshmallow creme."
      ],
      "tags": [
        "New-England",
        "uncountable"
      ]
    }
  ],
  "word": "marshmallow fluff"
}