"bu" meaning in Swedish

{
  "derived": [
    {
      "_dis1": "0 0",
      "word": "bua"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "interjection"
      },
      "expansion": "bu",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "intj",
  "senses": [
    {
      "glosses": [
        "boo; a loud exclamation intended to scare someone, usually a child."
      ],
      "id": "en-bu-sv-intj-YJ~Lgz4P",
      "links": [
        [
          "boo",
          "boo"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "21 79",
          "kind": "other",
          "name": "Swedish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "boo; an exclamation used to indicate derision or disapproval of what has just occurred."
      ],
      "id": "en-bu-sv-intj-JS8KNdmW",
      "links": [
        [
          "boo",
          "boo"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bʉː/"
    },
    {
      "rhymes": "-ʉː"
    }
  ],
  "word": "bu"
}

{
  "categories": [
    "Rhymes:Swedish/ʉː",
    "Rhymes:Swedish/ʉː/1 syllable",
    "Swedish entries with incorrect language header",
    "Swedish interjections",
    "Swedish lemmas",
    "Swedish terms with IPA pronunciation",
    "zom:Animal dwellings",
    "zom:Buildings",
    "zom:Foods"
  ],
  "derived": [
    {
      "word": "bua"
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "sv",
        "2": "interjection"
      },
      "expansion": "bu",
      "name": "head"
    }
  ],
  "lang": "Swedish",
  "lang_code": "sv",
  "pos": "intj",
  "senses": [
    {
      "glosses": [
        "boo; a loud exclamation intended to scare someone, usually a child."
      ],
      "links": [
        [
          "boo",
          "boo"
        ]
      ]
    },
    {
      "glosses": [
        "boo; an exclamation used to indicate derision or disapproval of what has just occurred."
      ],
      "links": [
        [
          "boo",
          "boo"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/bʉː/"
    },
    {
      "rhymes": "-ʉː"
    }
  ],
  "word": "bu"
}