"furious fifties" meaning in English

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      "expansion": "furious fifties pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "kind": "topical",
          "langcode": "en",
          "name": "Fifty",
          "orig": "en:Fifty",
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          "name": "Sailing",
          "orig": "en:Sailing",
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            "Nautical",
            "Transport",
            "All topics",
            "Fundamental"
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      "examples": [
        {
          "ref": "1998, Derek Lundy, chapter 1, in Godforsaken Sea: Racing the World's Most Dangerous Waters, page 5:",
          "text": "Its official demarcation is forty degrees south latitude. It includes the latitudes sailors long-ago nicknamed the roaring forties, the furious fifties, and the screaming sixties. It's an area of almost constant high wind and frequent gales, often exceeding hurricane strength.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The area of the earth between 50 and 60 degrees south, prone to strong winds."
      ],
      "id": "en-furious_fifties-en-noun-LkfGBMcg",
      "related": [
        {
          "word": "roaring forties"
        },
        {
          "word": "screaming sixties"
        }
      ],
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        "plural",
        "plural-only"
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      "translations": [
        {
          "code": "fr",
          "lang": "French",
          "sense": "area of the earth between 50 and 60 degrees south",
          "word": "cinquantièmes hurlants"
        },
        {
          "code": "uk",
          "lang": "Ukrainian",
          "roman": "šaleni pʺjatdesjati",
          "sense": "area of the earth between 50 and 60 degrees south",
          "tags": [
            "plural"
          ],
          "word": "шалені п'ятдесяті"
        },
        {
          "code": "uk",
          "lang": "Ukrainian",
          "roman": "nesamovyti pʺjatdesjati",
          "sense": "area of the earth between 50 and 60 degrees south",
          "tags": [
            "plural"
          ],
          "word": "несамовиті п'ятдесяті"
        },
        {
          "code": "uk",
          "lang": "Ukrainian",
          "roman": "buremni pʺjatdesjati",
          "sense": "area of the earth between 50 and 60 degrees south",
          "tags": [
            "plural"
          ],
          "word": "буремні п'ятдесяті"
        }
      ]
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  "word": "furious fifties"
}

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "roaring forties"
    },
    {
      "word": "screaming sixties"
    }
  ],
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          "ref": "1998, Derek Lundy, chapter 1, in Godforsaken Sea: Racing the World's Most Dangerous Waters, page 5:",
          "text": "Its official demarcation is forty degrees south latitude. It includes the latitudes sailors long-ago nicknamed the roaring forties, the furious fifties, and the screaming sixties. It's an area of almost constant high wind and frequent gales, often exceeding hurricane strength.",
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        "The area of the earth between 50 and 60 degrees south, prone to strong winds."
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  "translations": [
    {
      "code": "fr",
      "lang": "French",
      "sense": "area of the earth between 50 and 60 degrees south",
      "word": "cinquantièmes hurlants"
    },
    {
      "code": "uk",
      "lang": "Ukrainian",
      "roman": "šaleni pʺjatdesjati",
      "sense": "area of the earth between 50 and 60 degrees south",
      "tags": [
        "plural"
      ],
      "word": "шалені п'ятдесяті"
    },
    {
      "code": "uk",
      "lang": "Ukrainian",
      "roman": "nesamovyti pʺjatdesjati",
      "sense": "area of the earth between 50 and 60 degrees south",
      "tags": [
        "plural"
      ],
      "word": "несамовиті п'ятдесяті"
    },
    {
      "code": "uk",
      "lang": "Ukrainian",
      "roman": "buremni pʺjatdesjati",
      "sense": "area of the earth between 50 and 60 degrees south",
      "tags": [
        "plural"
      ],
      "word": "буремні п'ятдесяті"
    }
  ],
  "word": "furious fifties"
}