"koele kikker" meaning in Dutch

{
  "etymology_text": "Literally, “cool frog”.",
  "forms": [
    {
      "form": "koele kikkers",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "koel kikkertje",
      "tags": [
        "diminutive",
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-s",
        "3": "koel kikkertje"
      },
      "expansion": "koele kikker m (plural koele kikkers, diminutive koel kikkertje n)",
      "name": "nl-noun"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "an unemotional or empathyless person; a cold fish"
      ],
      "id": "en-koele_kikker-nl-noun-HgH~onZZ",
      "links": [
        [
          "unemotional",
          "unemotional"
        ],
        [
          "empathyless",
          "empathyless"
        ],
        [
          "cold fish",
          "cold fish"
        ]
      ],
      "synonyms": [
        {
          "word": "koude kikker"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌku.lə ˈkɪ.kər/"
    }
  ],
  "word": "koele kikker"
}

{
  "etymology_text": "Literally, “cool frog”.",
  "forms": [
    {
      "form": "koele kikkers",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "koel kikkertje",
      "tags": [
        "diminutive",
        "neuter"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "-s",
        "3": "koel kikkertje"
      },
      "expansion": "koele kikker m (plural koele kikkers, diminutive koel kikkertje n)",
      "name": "nl-noun"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Dutch entries with incorrect language header",
        "Dutch lemmas",
        "Dutch masculine nouns",
        "Dutch multiword terms",
        "Dutch nouns",
        "Dutch nouns with plural in -s",
        "Dutch terms with IPA pronunciation"
      ],
      "glosses": [
        "an unemotional or empathyless person; a cold fish"
      ],
      "links": [
        [
          "unemotional",
          "unemotional"
        ],
        [
          "empathyless",
          "empathyless"
        ],
        [
          "cold fish",
          "cold fish"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌku.lə ˈkɪ.kər/"
    }
  ],
  "synonyms": [
    {
      "word": "koude kikker"
    }
  ],
  "word": "koele kikker"
}