"hell-for-leather" meaning in English

{
  "etymology_text": "Earliest reference is from 1889 in \"The Gadsbys\" by Rudyard Kipling, referring to the effect on the leather of a saddle (or perhaps a crop) of riding a horse as fast as possible.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "hell-for-leather (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "He rode hell-for-leather to catch up with the stagecoach.",
          "type": "example"
        }
      ],
      "glosses": [
        "As fast as possible; recklessly fast."
      ],
      "id": "en-hell-for-leather-en-adv-cPKfd4lt",
      "links": [
        [
          "fast",
          "fast"
        ]
      ],
      "related": [
        {
          "word": "hell-bent for leather"
        }
      ],
      "synonyms": [
        {
          "word": "like a bat out of hell"
        },
        {
          "word": "hell for leather"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "translations": [
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "mint a szélvész"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "szélvészként"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "szélvészgyorsan"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "lóhalálában"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "mint a villám"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "as fast as possible; recklessly fast",
          "word": "észvesztő/eszeveszett sebességgel"
        },
        {
          "code": "nb",
          "lang": "Norwegian Bokmål",
          "sense": "as fast as possible; recklessly fast",
          "word": "fort som faen"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "slomjá gólovu",
          "sense": "as fast as possible; recklessly fast",
          "word": "сломя́ го́лову"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "as fast as possible; recklessly fast",
          "word": "a matacaballo"
        }
      ]
    }
  ],
  "word": "hell-for-leather"
}

{
  "etymology_text": "Earliest reference is from 1889 in \"The Gadsbys\" by Rudyard Kipling, referring to the effect on the leather of a saddle (or perhaps a crop) of riding a horse as fast as possible.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "hell-for-leather (not comparable)",
      "name": "en-adv"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "hell-bent for leather"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adverbs",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "English uncomparable adverbs"
      ],
      "examples": [
        {
          "text": "He rode hell-for-leather to catch up with the stagecoach.",
          "type": "example"
        }
      ],
      "glosses": [
        "As fast as possible; recklessly fast."
      ],
      "links": [
        [
          "fast",
          "fast"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "like a bat out of hell"
    },
    {
      "word": "hell for leather"
    }
  ],
  "translations": [
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "mint a szélvész"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "szélvészként"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "szélvészgyorsan"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "lóhalálában"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "mint a villám"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "as fast as possible; recklessly fast",
      "word": "észvesztő/eszeveszett sebességgel"
    },
    {
      "code": "nb",
      "lang": "Norwegian Bokmål",
      "sense": "as fast as possible; recklessly fast",
      "word": "fort som faen"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "slomjá gólovu",
      "sense": "as fast as possible; recklessly fast",
      "word": "сломя́ го́лову"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "as fast as possible; recklessly fast",
      "word": "a matacaballo"
    }
  ],
  "word": "hell-for-leather"
}