"Fat Man" meaning in English

{
  "etymology_text": "A military code name.",
  "head_templates": [
    {
      "args": {
        "head": "Fat Man"
      },
      "expansion": "Fat Man",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Atomic bombings of Hiroshima and Nagasaki",
          "orig": "en:Atomic bombings of Hiroshima and Nagasaki",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Explosives",
          "orig": "en:Explosives",
          "parents": [
            "Matter",
            "Weapons",
            "Chemistry",
            "Nature",
            "Hunting",
            "Military",
            "Tools",
            "Sciences",
            "All topics",
            "Human activity",
            "Society",
            "Technology",
            "Fundamental",
            "Human behaviour",
            "Human"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nuclear warfare",
          "orig": "en:Nuclear warfare",
          "parents": [
            "War",
            "Weapons",
            "Conflict",
            "Military",
            "Violence",
            "Hunting",
            "Tools",
            "Human behaviour",
            "Society",
            "Human activity",
            "Technology",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Weapons",
          "orig": "en:Weapons",
          "parents": [
            "Hunting",
            "Military",
            "Tools",
            "Human activity",
            "Society",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: Little Boy"
        }
      ],
      "glosses": [
        "The nuclear bomb dropped over Nagasaki, Japan on August 9, 1945."
      ],
      "id": "en-Fat_Man-en-name-uCmkVPXx",
      "links": [
        [
          "nuclear bomb",
          "nuclear bomb"
        ],
        [
          "Nagasaki",
          "Nagasaki"
        ],
        [
          "Japan",
          "Japan"
        ]
      ]
    }
  ],
  "word": "Fat Man"
}

{
  "etymology_text": "A military code name.",
  "head_templates": [
    {
      "args": {
        "head": "Fat Man"
      },
      "expansion": "Fat Man",
      "name": "en-prop"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Atomic bombings of Hiroshima and Nagasaki",
        "en:Explosives",
        "en:Nuclear warfare",
        "en:Weapons"
      ],
      "examples": [
        {
          "text": "Coordinate term: Little Boy"
        }
      ],
      "glosses": [
        "The nuclear bomb dropped over Nagasaki, Japan on August 9, 1945."
      ],
      "links": [
        [
          "nuclear bomb",
          "nuclear bomb"
        ],
        [
          "Nagasaki",
          "Nagasaki"
        ],
        [
          "Japan",
          "Japan"
        ]
      ]
    }
  ],
  "word": "Fat Man"
}