"koppie koppie" meaning in Dutch

{
  "etymology_text": "Reduplication of koppie, informal diminutive of kop (“head”).",
  "head_templates": [
    {
      "args": {
        "1": "pred",
        "2": "-"
      },
      "expansion": "koppie koppie (used only predicatively, not comparable)",
      "name": "nl-adj"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Dutch reduplications",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "His brother is really smart, he reads all day long.",
          "text": "Zijn broer is echt koppie koppie, hij zit de hele dag in de boeken.",
          "type": "example"
        }
      ],
      "glosses": [
        "smart"
      ],
      "id": "en-koppie_koppie-nl-adj-VE4tYUX2",
      "links": [
        [
          "smart",
          "smart"
        ]
      ],
      "raw_glosses": [
        "(informal) smart"
      ],
      "synonyms": [
        {
          "word": "koppie-koppie"
        }
      ],
      "tags": [
        "informal",
        "not-comparable",
        "predicative"
      ]
    }
  ],
  "word": "koppie koppie"
}

{
  "etymology_text": "Reduplication of koppie, informal diminutive of kop (“head”).",
  "head_templates": [
    {
      "args": {
        "1": "pred",
        "2": "-"
      },
      "expansion": "koppie koppie (used only predicatively, not comparable)",
      "name": "nl-adj"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "Dutch adjectives",
        "Dutch entries with incorrect language header",
        "Dutch informal terms",
        "Dutch lemmas",
        "Dutch multiword terms",
        "Dutch predicative-only adjectives",
        "Dutch reduplications",
        "Dutch terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "english": "His brother is really smart, he reads all day long.",
          "text": "Zijn broer is echt koppie koppie, hij zit de hele dag in de boeken.",
          "type": "example"
        }
      ],
      "glosses": [
        "smart"
      ],
      "links": [
        [
          "smart",
          "smart"
        ]
      ],
      "raw_glosses": [
        "(informal) smart"
      ],
      "tags": [
        "informal",
        "not-comparable",
        "predicative"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "koppie-koppie"
    }
  ],
  "word": "koppie koppie"
}