"blue job" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "job",
        "3": "",
        "4": "thing"
      },
      "expansion": "job (“thing”)",
      "name": "m"
    }
  ],
  "etymology_text": "From the colour of the uniform, and slang job (“thing”).",
  "forms": [
    {
      "form": "blue jobs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue job (plural blue jobs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Coordinate term: brown job"
        },
        {
          "ref": "2006, David W. Clark, Joe's Letters, page 38",
          "text": "Air force personnel used to distinguish airmen (blue jobs or boys in blue) from army personnel (brown jobs or boys in brown).",
          "type": "quotation"
        },
        {
          "ref": "2014, Preller Geldenhuys, Rhodesian Air Force Operations, page 224",
          "text": "As Blue Jobs we had to walk behind the sweep line, probably because we would have been a liability had there been a scene. We hadn't quite reached the camp area when we heard the sound of Ray's chopper.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A member of the air force."
      ],
      "id": "en-blue_job-en-noun-pmpz7qmS",
      "links": [
        [
          "air force",
          "air force"
        ]
      ],
      "qualifier": "air force slang",
      "raw_glosses": [
        "(UK, air force slang, dated) A member of the air force."
      ],
      "synonyms": [
        {
          "word": "boy in blue"
        }
      ],
      "tags": [
        "UK",
        "dated"
      ]
    }
  ],
  "word": "blue job"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "job",
        "3": "",
        "4": "thing"
      },
      "expansion": "job (“thing”)",
      "name": "m"
    }
  ],
  "etymology_text": "From the colour of the uniform, and slang job (“thing”).",
  "forms": [
    {
      "form": "blue jobs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue job (plural blue jobs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "text": "Coordinate term: brown job"
        },
        {
          "ref": "2006, David W. Clark, Joe's Letters, page 38",
          "text": "Air force personnel used to distinguish airmen (blue jobs or boys in blue) from army personnel (brown jobs or boys in brown).",
          "type": "quotation"
        },
        {
          "ref": "2014, Preller Geldenhuys, Rhodesian Air Force Operations, page 224",
          "text": "As Blue Jobs we had to walk behind the sweep line, probably because we would have been a liability had there been a scene. We hadn't quite reached the camp area when we heard the sound of Ray's chopper.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A member of the air force."
      ],
      "links": [
        [
          "air force",
          "air force"
        ]
      ],
      "qualifier": "air force slang",
      "raw_glosses": [
        "(UK, air force slang, dated) A member of the air force."
      ],
      "synonyms": [
        {
          "word": "boy in blue"
        }
      ],
      "tags": [
        "UK",
        "dated"
      ]
    }
  ],
  "word": "blue job"
}