"Chicago lightning" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Chicago lightning (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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      "examples": [
        {
          "ref": "1946, Joseph Thompson Shaw, The hard-boiled omnibus: early stories from Black Mask, page 388",
          "text": "He said: \"Thanks, friend; but you're wasting your time. You better warn Crocker. If that louse makes a play for me, he'll get hit with Chicago lightning!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Bullets; gunfire."
      ],
      "id": "en-Chicago_lightning-en-noun-YNK9GQKn",
      "links": [
        [
          "Bullets",
          "bullet"
        ],
        [
          "gunfire",
          "gunfire"
        ]
      ],
      "raw_glosses": [
        "(US, dated, slang) Bullets; gunfire."
      ],
      "related": [
        {
          "english": "tommy gun",
          "word": "Chicago typewriter"
        },
        {
          "english": "coffin",
          "word": "Chicago overcoat"
        }
      ],
      "tags": [
        "US",
        "dated",
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "Chicago lightning"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "Chicago lightning (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "english": "tommy gun",
      "word": "Chicago typewriter"
    },
    {
      "english": "coffin",
      "word": "Chicago overcoat"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "1946, Joseph Thompson Shaw, The hard-boiled omnibus: early stories from Black Mask, page 388",
          "text": "He said: \"Thanks, friend; but you're wasting your time. You better warn Crocker. If that louse makes a play for me, he'll get hit with Chicago lightning!\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Bullets; gunfire."
      ],
      "links": [
        [
          "Bullets",
          "bullet"
        ],
        [
          "gunfire",
          "gunfire"
        ]
      ],
      "raw_glosses": [
        "(US, dated, slang) Bullets; gunfire."
      ],
      "tags": [
        "US",
        "dated",
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "Chicago lightning"
}