"大山鳴動して鼠一匹" meaning in Japanese

{
  "etymology_templates": [
    {
      "args": {
        "1": "A great mountain rumbles and a rat appears"
      },
      "expansion": "“A great mountain rumbles and a rat appears”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "A great mountain rumbles and a rat appears"
      },
      "expansion": "Literally, “A great mountain rumbles and a rat appears”",
      "name": "lit"
    },
    {
      "args": {
        "1": "en",
        "2": "mountain in labour"
      },
      "expansion": "English mountain in labour",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “A great mountain rumbles and a rat appears”. From Horace: \"parturiunt montes, nascetur ridiculus mus\". Compare English mountain in labour.",
  "forms": [
    {
      "form": "大山鳴動して鼠一匹",
      "ruby": [
        [
          "大",
          "たい"
        ],
        [
          "山",
          "ざん"
        ],
        [
          "鳴",
          "めい"
        ],
        [
          "動",
          "どう"
        ],
        [
          "鼠",
          "ねずみ"
        ],
        [
          "一",
          "いっ"
        ],
        [
          "匹",
          "ぴき"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "taizan meidō shite nezumi ippiki",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "たいざん めいどう して ねずみ いっぴき",
        "head": "大山鳴動して鼠一匹"
      },
      "expansion": "大(たい)山(ざん)鳴(めい)動(どう)して鼠(ねずみ)一(いっ)匹(ぴき) • (taizan meidō shite nezumi ippiki)",
      "name": "ja-phrase"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "phrase",
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    {
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          "kind": "other",
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          "kind": "other",
          "name": "Japanese terms with 7 kanji",
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      ],
      "glosses": [
        "all bark and no bite; great cry and little wool"
      ],
      "id": "en-大山鳴動して鼠一匹-ja-phrase-1u3xkkvh",
      "links": [
        [
          "all bark and no bite",
          "all bark and no bite"
        ],
        [
          "great cry and little wool",
          "great cry and little wool"
        ]
      ]
    }
  ],
  "word": "大山鳴動して鼠一匹"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "A great mountain rumbles and a rat appears"
      },
      "expansion": "“A great mountain rumbles and a rat appears”",
      "name": "m-g"
    },
    {
      "args": {
        "1": "A great mountain rumbles and a rat appears"
      },
      "expansion": "Literally, “A great mountain rumbles and a rat appears”",
      "name": "lit"
    },
    {
      "args": {
        "1": "en",
        "2": "mountain in labour"
      },
      "expansion": "English mountain in labour",
      "name": "cog"
    }
  ],
  "etymology_text": "Literally, “A great mountain rumbles and a rat appears”. From Horace: \"parturiunt montes, nascetur ridiculus mus\". Compare English mountain in labour.",
  "forms": [
    {
      "form": "大山鳴動して鼠一匹",
      "ruby": [
        [
          "大",
          "たい"
        ],
        [
          "山",
          "ざん"
        ],
        [
          "鳴",
          "めい"
        ],
        [
          "動",
          "どう"
        ],
        [
          "鼠",
          "ねずみ"
        ],
        [
          "一",
          "いっ"
        ],
        [
          "匹",
          "ぴき"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "taizan meidō shite nezumi ippiki",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "たいざん めいどう して ねずみ いっぴき",
        "head": "大山鳴動して鼠一匹"
      },
      "expansion": "大(たい)山(ざん)鳴(めい)動(どう)して鼠(ねずみ)一(いっ)匹(ぴき) • (taizan meidō shite nezumi ippiki)",
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        "Japanese terms with 7 kanji",
        "Japanese terms with multiple readings",
        "Japanese terms with redundant sortkeys",
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        "Pages with entries"
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      "glosses": [
        "all bark and no bite; great cry and little wool"
      ],
      "links": [
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          "all bark and no bite",
          "all bark and no bite"
        ],
        [
          "great cry and little wool",
          "great cry and little wool"
        ]
      ]
    }
  ],
  "word": "大山鳴動して鼠一匹"
}