"だから何だ" meaning in Japanese

{
  "forms": [
    {
      "form": "だから何だ",
      "ruby": [
        [
          "何",
          "なん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "da kara nan da",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection",
        "2": "だ から なん だ"
      },
      "expansion": "だから何(なん)だ • (da kara nan da)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "literally, “It has a feeling of \"so what\", but it might be interesting.”",
          "ruby": [
            [
              "何",
              "なん"
            ],
            [
              "感",
              "かん"
            ],
            [
              "面",
              "おも"
            ],
            [
              "白",
              "しろ"
            ]
          ],
          "text": "だから何だという感じですが、面白いかもね。\nDa kara nan da to iu kanji desu ga, omoshiroi ka mo ne.\nYou might think \"so what\", but it might be interesting."
        }
      ],
      "glosses": [
        "so what"
      ],
      "id": "en-だから何だ-ja-intj-lbgUp7y7",
      "links": [
        [
          "so what",
          "so what"
        ]
      ]
    }
  ],
  "word": "だから何だ"
}

{
  "forms": [
    {
      "form": "だから何だ",
      "ruby": [
        [
          "何",
          "なん"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "da kara nan da",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection",
        "2": "だ から なん だ"
      },
      "expansion": "だから何(なん)だ • (da kara nan da)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese interjections",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms with redundant sortkeys",
        "Japanese terms with usage examples",
        "Japanese terms written with one Han script character"
      ],
      "examples": [
        {
          "english": "literally, “It has a feeling of \"so what\", but it might be interesting.”",
          "ruby": [
            [
              "何",
              "なん"
            ],
            [
              "感",
              "かん"
            ],
            [
              "面",
              "おも"
            ],
            [
              "白",
              "しろ"
            ]
          ],
          "text": "だから何だという感じですが、面白いかもね。\nDa kara nan da to iu kanji desu ga, omoshiroi ka mo ne.\nYou might think \"so what\", but it might be interesting."
        }
      ],
      "glosses": [
        "so what"
      ],
      "links": [
        [
          "so what",
          "so what"
        ]
      ]
    }
  ],
  "word": "だから何だ"
}