"black op" meaning in English

{
  "forms": [
    {
      "form": "black ops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black op (plural black ops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "black operation"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2020 February 26, Will Dunn, “William Gibson on the apocalypse: “it’s been happening for at least 100 years””, in New Statesman",
          "text": "He describes Russia’s reported attempts to influence the 2016 US election as “the most cost-efficient black op in human history […]”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Clipping of black operation."
      ],
      "id": "en-black_op-en-noun-we-vHx6n",
      "links": [
        [
          "black operation",
          "black operation#English"
        ]
      ],
      "raw_glosses": [
        "(informal) Clipping of black operation."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "clipping",
        "informal"
      ]
    }
  ],
  "word": "black op"
}

{
  "forms": [
    {
      "form": "black ops",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black op (plural black ops)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "black operation"
        }
      ],
      "categories": [
        "English clippings",
        "English countable nouns",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2020 February 26, Will Dunn, “William Gibson on the apocalypse: “it’s been happening for at least 100 years””, in New Statesman",
          "text": "He describes Russia’s reported attempts to influence the 2016 US election as “the most cost-efficient black op in human history […]”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Clipping of black operation."
      ],
      "links": [
        [
          "black operation",
          "black operation#English"
        ]
      ],
      "raw_glosses": [
        "(informal) Clipping of black operation."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "clipping",
        "informal"
      ]
    }
  ],
  "word": "black op"
}