"sans crier gare" meaning in French

{
  "head_templates": [
    {
      "args": {},
      "expansion": "sans crier gare",
      "name": "fr-adv"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "without warning, out of the blue"
      ],
      "id": "en-sans_crier_gare-fr-adv-Q7PgieYH",
      "links": [
        [
          "out of the blue",
          "out of the blue"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɑ̃ kʁi.je ɡaʁ/"
    }
  ],
  "word": "sans crier gare"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "sans crier gare",
      "name": "fr-adv"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "French adverbs",
        "French entries with incorrect language header",
        "French lemmas",
        "French multiword terms",
        "French terms with IPA pronunciation"
      ],
      "glosses": [
        "without warning, out of the blue"
      ],
      "links": [
        [
          "out of the blue",
          "out of the blue"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/sɑ̃ kʁi.je ɡaʁ/"
    }
  ],
  "word": "sans crier gare"
}