"not on your nelly" meaning in English

{
  "etymology_text": "From nelly, Nelly Duff, rhyming slang for puff (of breath = life).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adverb"
      },
      "expansion": "not on your nelly",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
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            "Entry maintenance"
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          "name": "Terms with Maori translations",
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        },
        {
          "kind": "other",
          "name": "Terms with Serbo-Croatian translations",
          "parents": [],
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        }
      ],
      "glosses": [
        "not on your life, an emphatic form of no."
      ],
      "id": "en-not_on_your_nelly-en-adv-37BEylwX",
      "links": [
        [
          "not on your life",
          "not on your life"
        ],
        [
          "emphatic",
          "emphatic"
        ],
        [
          "no",
          "no"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, chiefly UK) not on your life, an emphatic form of no."
      ],
      "synonyms": [
        {
          "word": "not on your Nellie"
        },
        {
          "word": "not in a million years"
        },
        {
          "word": "not likely"
        },
        {
          "word": "not on your life"
        },
        {
          "word": "no way"
        },
        {
          "word": "no way Jose"
        },
        {
          "word": "when pigs fly"
        },
        {
          "word": "a cold day in Hell"
        }
      ],
      "tags": [
        "UK",
        "idiomatic"
      ],
      "translations": [
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "an emphatic negative",
          "word": "nōhea hoki"
        },
        {
          "code": "mi",
          "lang": "Maori",
          "sense": "an emphatic negative",
          "word": "nōwhea hoki"
        },
        {
          "code": "sh",
          "lang": "Serbo-Croatian",
          "sense": "an emphatic negative",
          "word": "ni za živu glavu"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-not on your nelly.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/1/12/En-au-not_on_your_nelly.ogg/En-au-not_on_your_nelly.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/1/12/En-au-not_on_your_nelly.ogg"
    }
  ],
  "word": "not on your nelly"
}

{
  "etymology_text": "From nelly, Nelly Duff, rhyming slang for puff (of breath = life).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adverb"
      },
      "expansion": "not on your nelly",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "British English",
        "English adverbs",
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English pro-sentences",
        "English responses",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Maori translations",
        "Terms with Serbo-Croatian translations"
      ],
      "glosses": [
        "not on your life, an emphatic form of no."
      ],
      "links": [
        [
          "not on your life",
          "not on your life"
        ],
        [
          "emphatic",
          "emphatic"
        ],
        [
          "no",
          "no"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, chiefly UK) not on your life, an emphatic form of no."
      ],
      "tags": [
        "UK",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-not on your nelly.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/1/12/En-au-not_on_your_nelly.ogg/En-au-not_on_your_nelly.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/1/12/En-au-not_on_your_nelly.ogg"
    }
  ],
  "synonyms": [
    {
      "word": "not on your Nellie"
    },
    {
      "word": "not in a million years"
    },
    {
      "word": "not likely"
    },
    {
      "word": "not on your life"
    },
    {
      "word": "no way"
    },
    {
      "word": "no way Jose"
    },
    {
      "word": "when pigs fly"
    },
    {
      "word": "a cold day in Hell"
    }
  ],
  "translations": [
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "an emphatic negative",
      "word": "nōhea hoki"
    },
    {
      "code": "mi",
      "lang": "Maori",
      "sense": "an emphatic negative",
      "word": "nōwhea hoki"
    },
    {
      "code": "sh",
      "lang": "Serbo-Croatian",
      "sense": "an emphatic negative",
      "word": "ni za živu glavu"
    }
  ],
  "word": "not on your nelly"
}