"roll coal" meaning in English

{
  "forms": [
    {
      "form": "rolls coal",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "rolling coal",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "rolled coal",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "rolled coal",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roll coal (third-person singular simple present rolls coal, present participle rolling coal, simple past and past participle rolled coal)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Automotive",
          "orig": "en:Automotive",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2016 September 4, Hiroko Tabuchi, “‘Rolling Coal’ in Diesel Trucks, to Rebel and Provoke”, in The New York Times:",
          "text": "“Why don’t you go live in Sweden and get the heck out of our country,” Mr. Blue wrote.” I will continue to roll coal anytime I feel like and fog your stupid eco-cars.”",
          "type": "quote"
        },
        {
          "ref": "(Can we date this quote?), Tales from the Gas Station: Volume Three, Jack Townsend, page 59:",
          "text": "The light turned red, and Jerry peeled into the intersection, hooking left as an oversized pickup truck rolled coal and blared its horn at us. “Sorry!” I screamed for no good reason. Jerry skidded into another right turn.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To emit sooty exhaust fumes from a modified (diesel) engine (fad among anti-environmentalist American truck drivers)."
      ],
      "id": "en-roll_coal-en-verb-0JmCAYpZ",
      "links": [
        [
          "sooty",
          "sooty"
        ],
        [
          "exhaust",
          "exhaust"
        ],
        [
          "fume",
          "fume"
        ],
        [
          "diesel",
          "diesel"
        ],
        [
          "anti-environmentalist",
          "anti-environmentalist#English"
        ]
      ],
      "raw_glosses": [
        "(US, slang) To emit sooty exhaust fumes from a modified (diesel) engine (fad among anti-environmentalist American truck drivers)."
      ],
      "related": [
        {
          "word": "coal-rolled"
        },
        {
          "word": "coal roller"
        },
        {
          "word": "coal-rolling"
        },
        {
          "word": "wet stacking"
        }
      ],
      "tags": [
        "US",
        "slang"
      ],
      "wikipedia": [
        "roll coal"
      ]
    }
  ],
  "word": "roll coal"
}

{
  "forms": [
    {
      "form": "rolls coal",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "rolling coal",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "rolled coal",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "rolled coal",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "roll coal (third-person singular simple present rolls coal, present participle rolling coal, simple past and past participle rolled coal)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "coal-rolled"
    },
    {
      "word": "coal roller"
    },
    {
      "word": "coal-rolling"
    },
    {
      "word": "wet stacking"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English slang",
        "English terms with quotations",
        "English verbs",
        "Pages with 1 entry",
        "Pages with entries",
        "Requests for date",
        "en:Automotive"
      ],
      "examples": [
        {
          "ref": "2016 September 4, Hiroko Tabuchi, “‘Rolling Coal’ in Diesel Trucks, to Rebel and Provoke”, in The New York Times:",
          "text": "“Why don’t you go live in Sweden and get the heck out of our country,” Mr. Blue wrote.” I will continue to roll coal anytime I feel like and fog your stupid eco-cars.”",
          "type": "quote"
        },
        {
          "ref": "(Can we date this quote?), Tales from the Gas Station: Volume Three, Jack Townsend, page 59:",
          "text": "The light turned red, and Jerry peeled into the intersection, hooking left as an oversized pickup truck rolled coal and blared its horn at us. “Sorry!” I screamed for no good reason. Jerry skidded into another right turn.",
          "type": "quote"
        }
      ],
      "glosses": [
        "To emit sooty exhaust fumes from a modified (diesel) engine (fad among anti-environmentalist American truck drivers)."
      ],
      "links": [
        [
          "sooty",
          "sooty"
        ],
        [
          "exhaust",
          "exhaust"
        ],
        [
          "fume",
          "fume"
        ],
        [
          "diesel",
          "diesel"
        ],
        [
          "anti-environmentalist",
          "anti-environmentalist#English"
        ]
      ],
      "raw_glosses": [
        "(US, slang) To emit sooty exhaust fumes from a modified (diesel) engine (fad among anti-environmentalist American truck drivers)."
      ],
      "tags": [
        "US",
        "slang"
      ],
      "wikipedia": [
        "roll coal"
      ]
    }
  ],
  "word": "roll coal"
}