"blue flu" meaning in English

{
  "etymology_text": "In reference to blue police uniforms.",
  "forms": [
    {
      "form": "blue flus",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "blue flu (countable and uncountable, plural blue flus)",
      "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": "Law enforcement",
          "orig": "en:Law enforcement",
          "parents": [
            "Crime prevention",
            "Emergency services",
            "Law",
            "Crime",
            "Public safety",
            "Justice",
            "Criminal law",
            "Society",
            "Public administration",
            "Security",
            "All topics",
            "Government",
            "Fundamental",
            "Politics"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An industrial action taken by members of the police, claiming sickness en masse."
      ],
      "hypernyms": [
        {
          "word": "sickout"
        }
      ],
      "id": "en-blue_flu-en-noun-KUrLL2bA",
      "links": [
        [
          "industrial action",
          "industrial action"
        ],
        [
          "member",
          "member"
        ],
        [
          "police",
          "police"
        ],
        [
          "sickness",
          "sickness"
        ],
        [
          "en masse",
          "en masse"
        ]
      ],
      "raw_glosses": [
        "(informal) An industrial action taken by members of the police, claiming sickness en masse."
      ],
      "related": [
        {
          "word": "thin blue line"
        }
      ],
      "tags": [
        "countable",
        "informal",
        "uncountable"
      ],
      "wikipedia": [
        "blue flu"
      ]
    }
  ],
  "word": "blue flu"
}

{
  "etymology_text": "In reference to blue police uniforms.",
  "forms": [
    {
      "form": "blue flus",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "blue flu (countable and uncountable, plural blue flus)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "sickout"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "thin blue line"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "en:Law enforcement"
      ],
      "glosses": [
        "An industrial action taken by members of the police, claiming sickness en masse."
      ],
      "links": [
        [
          "industrial action",
          "industrial action"
        ],
        [
          "member",
          "member"
        ],
        [
          "police",
          "police"
        ],
        [
          "sickness",
          "sickness"
        ],
        [
          "en masse",
          "en masse"
        ]
      ],
      "raw_glosses": [
        "(informal) An industrial action taken by members of the police, claiming sickness en masse."
      ],
      "tags": [
        "countable",
        "informal",
        "uncountable"
      ],
      "wikipedia": [
        "blue flu"
      ]
    }
  ],
  "word": "blue flu"
}