"in one foul swoop" meaning in English

{
  "etymology_text": "Mondegreen variant of in one fell swoop, where \"fell\" (of a strong and cruel nature; eager and unsparing; grim; fierce; ruthless; savage) is misheard as \"foul\" (disgusting) or \"fowl\" (a bird).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
      },
      "expansion": "in one foul swoop",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English eggcorns",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1915 November 18, The Labor Call, page 10:",
          "text": "The acquiescence of the party as the result of hasty and immature deliberation, is indicative of a supreme contempt of comrades, and vitiates in one foul swoop the conditions that regulate the movement.",
          "type": "quote"
        },
        {
          "ref": "2013, Chris J. Berry, The Celestial Window, page 22:",
          "text": "All their suspicions had evaporated in one foul swoop by Neil's announcement, and was now confirmed by a document that if they signed, asked them to become trustees of Neil's charity.",
          "type": "quote"
        },
        {
          "ref": "2017, BJ Harvey, One Shot, page 59:",
          "text": "I need to get it all out at once, inflicting the damage in one foul swoop before facing the fallout left in my wake.",
          "type": "quote"
        }
      ],
      "glosses": [
        "(Achieved or completed) with a single action; in a single stroke."
      ],
      "id": "en-in_one_foul_swoop-en-prep_phrase-eSCW0FVe",
      "links": [
        [
          "Achieved",
          "achieve"
        ],
        [
          "complete",
          "complete"
        ],
        [
          "single",
          "single"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, proscribed) (Achieved or completed) with a single action; in a single stroke."
      ],
      "tags": [
        "idiomatic",
        "proscribed"
      ]
    }
  ],
  "word": "in one foul swoop"
}

{
  "etymology_text": "Mondegreen variant of in one fell swoop, where \"fell\" (of a strong and cruel nature; eager and unsparing; grim; fierce; ruthless; savage) is misheard as \"foul\" (disgusting) or \"fowl\" (a bird).",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase"
      },
      "expansion": "in one foul swoop",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        "English eggcorns",
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases",
        "English proscribed terms",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1915 November 18, The Labor Call, page 10:",
          "text": "The acquiescence of the party as the result of hasty and immature deliberation, is indicative of a supreme contempt of comrades, and vitiates in one foul swoop the conditions that regulate the movement.",
          "type": "quote"
        },
        {
          "ref": "2013, Chris J. Berry, The Celestial Window, page 22:",
          "text": "All their suspicions had evaporated in one foul swoop by Neil's announcement, and was now confirmed by a document that if they signed, asked them to become trustees of Neil's charity.",
          "type": "quote"
        },
        {
          "ref": "2017, BJ Harvey, One Shot, page 59:",
          "text": "I need to get it all out at once, inflicting the damage in one foul swoop before facing the fallout left in my wake.",
          "type": "quote"
        }
      ],
      "glosses": [
        "(Achieved or completed) with a single action; in a single stroke."
      ],
      "links": [
        [
          "Achieved",
          "achieve"
        ],
        [
          "complete",
          "complete"
        ],
        [
          "single",
          "single"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, proscribed) (Achieved or completed) with a single action; in a single stroke."
      ],
      "tags": [
        "idiomatic",
        "proscribed"
      ]
    }
  ],
  "word": "in one foul swoop"
}