"base wallah" meaning in English

{
  "forms": [
    {
      "form": "base wallahs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "base wallah (plural base wallahs)",
      "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"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A person employed at a military base, or with a job far behind the front lines."
      ],
      "id": "en-base_wallah-en-noun-HwplF-zL",
      "links": [
        [
          "derogatory",
          "derogatory"
        ],
        [
          "employ",
          "employ"
        ],
        [
          "military",
          "military"
        ],
        [
          "base",
          "base"
        ],
        [
          "job",
          "job"
        ],
        [
          "front line",
          "front line"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, derogatory) A person employed at a military base, or with a job far behind the front lines."
      ],
      "tags": [
        "UK",
        "derogatory",
        "slang"
      ]
    }
  ],
  "word": "base wallah"
}

{
  "forms": [
    {
      "form": "base wallahs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "base wallah (plural base wallahs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English countable nouns",
        "English derogatory terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "A person employed at a military base, or with a job far behind the front lines."
      ],
      "links": [
        [
          "derogatory",
          "derogatory"
        ],
        [
          "employ",
          "employ"
        ],
        [
          "military",
          "military"
        ],
        [
          "base",
          "base"
        ],
        [
          "job",
          "job"
        ],
        [
          "front line",
          "front line"
        ]
      ],
      "raw_glosses": [
        "(UK, slang, derogatory) A person employed at a military base, or with a job far behind the front lines."
      ],
      "tags": [
        "UK",
        "derogatory",
        "slang"
      ]
    }
  ],
  "word": "base wallah"
}