"sweet nothing" meaning in English

{
  "forms": [
    {
      "form": "sweet nothings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sweet nothing (plural sweet nothings)",
      "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": "2012, “Sweet Nothing”, in 18 Months, performed by Calvin Harris ft. Florence Welch",
          "text": "And it's hard to learn, and it's hard to love / When you're giving me such sweet nothing",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "sweet nothings"
        }
      ],
      "glosses": [
        "singular of sweet nothings"
      ],
      "id": "en-sweet_nothing-en-noun-~QaQEijE",
      "links": [
        [
          "sweet nothings",
          "sweet nothings#English"
        ]
      ],
      "tags": [
        "form-of",
        "singular"
      ]
    }
  ],
  "word": "sweet nothing"
}

{
  "forms": [
    {
      "form": "sweet nothings",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sweet nothing (plural sweet nothings)",
      "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"
      ],
      "examples": [
        {
          "ref": "2012, “Sweet Nothing”, in 18 Months, performed by Calvin Harris ft. Florence Welch",
          "text": "And it's hard to learn, and it's hard to love / When you're giving me such sweet nothing",
          "type": "quotation"
        }
      ],
      "form_of": [
        {
          "word": "sweet nothings"
        }
      ],
      "glosses": [
        "singular of sweet nothings"
      ],
      "links": [
        [
          "sweet nothings",
          "sweet nothings#English"
        ]
      ],
      "tags": [
        "form-of",
        "singular"
      ]
    }
  ],
  "word": "sweet nothing"
}