"ブー" meaning in Japanese

{
  "forms": [
    {
      "form": "bū",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection"
      },
      "expansion": "ブー • (bū)",
      "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 katakana",
          "parents": [],
          "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"
        }
      ],
      "coordinate_terms": [
        {
          "roman": "pinpon",
          "word": "ピンポン"
        }
      ],
      "glosses": [
        "Onomatopoeia for the sound effect associated with an incorrect answer."
      ],
      "id": "en-ブー-ja-intj--csvOpCt",
      "related": [
        {
          "roman": "ttaeng",
          "sense": "Korean",
          "word": "땡"
        }
      ]
    }
  ],
  "word": "ブー"
}

{
  "coordinate_terms": [
    {
      "roman": "pinpon",
      "word": "ピンポン"
    }
  ],
  "forms": [
    {
      "form": "bū",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "interjection"
      },
      "expansion": "ブー • (bū)",
      "name": "ja-pos"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "intj",
  "related": [
    {
      "roman": "ttaeng",
      "sense": "Korean",
      "word": "땡"
    }
  ],
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese interjections",
        "Japanese katakana",
        "Japanese lemmas",
        "Japanese links with redundant wikilinks",
        "Japanese terms with redundant sortkeys"
      ],
      "glosses": [
        "Onomatopoeia for the sound effect associated with an incorrect answer."
      ]
    }
  ],
  "word": "ブー"
}