"never-never" meaning in English

{
  "etymology_text": "Suggesting that the would-be purchaser may never manage to complete the payments and take ownership.",
  "forms": [
    {
      "form": "the never-never",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "the never-never"
      },
      "expansion": "the never-never",
      "name": "head"
    }
  ],
  "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 language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English reduplicated coordinated pairs",
          "parents": [
            "Reduplicated coordinated pairs",
            "Coordinated pairs",
            "Reduplications",
            "Terms by etymology"
          ],
          "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"
        }
      ],
      "glosses": [
        "The hire purchase system."
      ],
      "id": "en-never-never-en-noun-XMfmSS18",
      "links": [
        [
          "hire purchase",
          "hire purchase"
        ]
      ],
      "raw_glosses": [
        "(colloquial) The hire purchase system."
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "never-never"
}

{
  "etymology_text": "Suggesting that the would-be purchaser may never manage to complete the payments and take ownership.",
  "forms": [
    {
      "form": "the never-never",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun",
        "head": "the never-never"
      },
      "expansion": "the never-never",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English colloquialisms",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English reduplicated coordinated pairs",
        "English terms with non-redundant non-automated sortkeys"
      ],
      "glosses": [
        "The hire purchase system."
      ],
      "links": [
        [
          "hire purchase",
          "hire purchase"
        ]
      ],
      "raw_glosses": [
        "(colloquial) The hire purchase system."
      ],
      "tags": [
        "colloquial"
      ]
    }
  ],
  "word": "never-never"
}