"rocket surgery" meaning in English

{
  "etymology_text": "A deliberate mixed metaphor combining rocket science and brain surgery.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "rocket surgery (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "parents": [
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            "Terms by semantic function"
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        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
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        }
      ],
      "examples": [
        {
          "text": "It's not rocket surgery. Just screw in the bulb and flip the switch.",
          "type": "example"
        }
      ],
      "glosses": [
        "Anything overly complex, detailed or confusing."
      ],
      "id": "en-rocket_surgery-en-noun-Kew4cPn7",
      "links": [
        [
          "complex",
          "complex"
        ],
        [
          "detailed",
          "detailed"
        ],
        [
          "confusing",
          "confusing"
        ]
      ],
      "raw_glosses": [
        "(chiefly in the negative) Anything overly complex, detailed or confusing."
      ],
      "raw_tags": [
        "in the negative"
      ],
      "related": [
        {
          "word": "rocket surgeon"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "anything overly complex",
          "word": "rakettitiede"
        }
      ]
    }
  ],
  "word": "rocket surgery"
}

{
  "etymology_text": "A deliberate mixed metaphor combining rocket science and brain surgery.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "rocket surgery (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "rocket surgeon"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English negative polarity items",
        "English nouns",
        "English terms with usage examples",
        "English uncountable nouns",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Finnish translations"
      ],
      "examples": [
        {
          "text": "It's not rocket surgery. Just screw in the bulb and flip the switch.",
          "type": "example"
        }
      ],
      "glosses": [
        "Anything overly complex, detailed or confusing."
      ],
      "links": [
        [
          "complex",
          "complex"
        ],
        [
          "detailed",
          "detailed"
        ],
        [
          "confusing",
          "confusing"
        ]
      ],
      "raw_glosses": [
        "(chiefly in the negative) Anything overly complex, detailed or confusing."
      ],
      "raw_tags": [
        "in the negative"
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "anything overly complex",
      "word": "rakettitiede"
    }
  ],
  "word": "rocket surgery"
}