"fat lot of good" meaning in English

{
  "etymology_text": "From a fat lot.",
  "forms": [
    {
      "form": "a fat lot of good",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun"
      },
      "expansion": "fat lot of good",
      "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": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Dutch translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Finnish translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with French translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Polish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Fat lot of good that'll do me!",
          "type": "example"
        },
        {
          "ref": "1919, J. Storer Clouston, chapter 18, in Simon:",
          "text": "\"Well, there's your friend Silent Simon, and all the police—\" / \"A fat lot of good they are!\" said Ned.",
          "type": "quote"
        }
      ],
      "glosses": [
        "of no use or help"
      ],
      "id": "en-fat_lot_of_good-en-noun-jef5coa8",
      "links": [
        [
          "use",
          "use"
        ],
        [
          "help",
          "help"
        ]
      ],
      "raw_glosses": [
        "(informal, idiomatic) of no use or help"
      ],
      "synonyms": [
        {
          "word": "fat lot of use"
        },
        {
          "word": "fat lot of help"
        }
      ],
      "tags": [
        "idiomatic",
        "informal"
      ],
      "translations": [
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "Translations",
          "word": "er vet mee zijn"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "paljoa hyötyä"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "faire une belle jambe"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "word": "na nic"
        }
      ]
    }
  ],
  "word": "fat lot of good"
}

{
  "etymology_text": "From a fat lot.",
  "forms": [
    {
      "form": "a fat lot of good",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun"
      },
      "expansion": "fat lot of good",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English terms with usage examples",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Dutch translations",
        "Terms with Finnish translations",
        "Terms with French translations",
        "Terms with Polish translations",
        "Translation table header lacks gloss"
      ],
      "examples": [
        {
          "text": "Fat lot of good that'll do me!",
          "type": "example"
        },
        {
          "ref": "1919, J. Storer Clouston, chapter 18, in Simon:",
          "text": "\"Well, there's your friend Silent Simon, and all the police—\" / \"A fat lot of good they are!\" said Ned.",
          "type": "quote"
        }
      ],
      "glosses": [
        "of no use or help"
      ],
      "links": [
        [
          "use",
          "use"
        ],
        [
          "help",
          "help"
        ]
      ],
      "raw_glosses": [
        "(informal, idiomatic) of no use or help"
      ],
      "synonyms": [
        {
          "word": "fat lot of use"
        },
        {
          "word": "fat lot of help"
        }
      ],
      "tags": [
        "idiomatic",
        "informal"
      ]
    }
  ],
  "translations": [
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "Translations",
      "word": "er vet mee zijn"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "paljoa hyötyä"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "faire une belle jambe"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "word": "na nic"
    }
  ],
  "word": "fat lot of good"
}