"niff-naff" meaning in English

{
  "forms": [
    {
      "form": "niff-naffs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "niff-naff (plural niff-naffs)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1869, Thomas Thomson, Tales and sketches, page 322",
          "text": "When it came to Mr. Turnbull, he held it up between him and the light, \"Keatie, whaten a niff-naff of a glass is this? let us see a feasible ane.\"",
          "type": "quotation"
        },
        {
          "ref": "2006, Ski, volume 71, number 3, page 175",
          "text": "\"They appear, friend,\" I reply, unhelpfully and without irony, as if any niff-naff who owns a megayacht with a decent liquor cabinet would know such a thing, \"rather like the color of absinthe.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Something or someone insignificant; a trifle."
      ],
      "id": "en-niff-naff-en-noun-doMIfONz",
      "links": [
        [
          "insignificant",
          "insignificant"
        ],
        [
          "trifle",
          "trifle"
        ]
      ]
    }
  ],
  "word": "niff-naff"
}

{
  "forms": [
    {
      "form": "niff-naffs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "niff-naff (plural niff-naffs)",
      "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",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1869, Thomas Thomson, Tales and sketches, page 322",
          "text": "When it came to Mr. Turnbull, he held it up between him and the light, \"Keatie, whaten a niff-naff of a glass is this? let us see a feasible ane.\"",
          "type": "quotation"
        },
        {
          "ref": "2006, Ski, volume 71, number 3, page 175",
          "text": "\"They appear, friend,\" I reply, unhelpfully and without irony, as if any niff-naff who owns a megayacht with a decent liquor cabinet would know such a thing, \"rather like the color of absinthe.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Something or someone insignificant; a trifle."
      ],
      "links": [
        [
          "insignificant",
          "insignificant"
        ],
        [
          "trifle",
          "trifle"
        ]
      ]
    }
  ],
  "word": "niff-naff"
}