"flat lad" meaning in English

{
  "forms": [
    {
      "form": "flat lads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flat lad (plural flat lads)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mining",
          "orig": "en:Mining",
          "parents": [
            "Industries",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "People",
          "orig": "en:People",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A craneman working with tubs and flats."
      ],
      "id": "en-flat_lad-en-noun-jSRmpLrU",
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "craneman",
          "craneman"
        ],
        [
          "tub",
          "tub"
        ],
        [
          "flat",
          "flat"
        ]
      ],
      "raw_glosses": [
        "(mining, historical) A craneman working with tubs and flats."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "flat lad"
}

{
  "forms": [
    {
      "form": "flat lads",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "flat lad (plural flat lads)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with historical senses",
        "English terms with non-redundant non-automated sortkeys",
        "en:Mining",
        "en:People"
      ],
      "glosses": [
        "A craneman working with tubs and flats."
      ],
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "craneman",
          "craneman"
        ],
        [
          "tub",
          "tub"
        ],
        [
          "flat",
          "flat"
        ]
      ],
      "raw_glosses": [
        "(mining, historical) A craneman working with tubs and flats."
      ],
      "tags": [
        "historical"
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "flat lad"
}