"black beauty" meaning in English

{
  "forms": [
    {
      "form": "black beauties",
      "tags": [
        "plural"
      ]
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  "head_templates": [
    {
      "args": {},
      "expansion": "black beauty (plural black beauties)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "examples": [
        {
          "ref": "2020, Ben Aaronovitch, “A Dedicated Follower of Fashion”, in Tales from the Folly: A Rivers of London Short Story Collection, JABberwocky Literary Agency, Inc., pages 136-137:",
          "text": "‘Got any more black beauties?’ asked Nigel, who never could separate his biphetamines from his common or garden amphetamines.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of black bomber (“kind of amphetamine capsule”)."
      ],
      "id": "en-black_beauty-en-noun-YtjcaZED",
      "links": [
        [
          "black bomber",
          "black bomber#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Synonym of black bomber (“kind of amphetamine capsule”)."
      ],
      "synonyms": [
        {
          "extra": "kind of amphetamine capsule",
          "tags": [
            "synonym",
            "synonym-of"
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          "word": "black bomber"
        }
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "black beauty"
}

{
  "forms": [
    {
      "form": "black beauties",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "black beauty (plural black beauties)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "ref": "2020, Ben Aaronovitch, “A Dedicated Follower of Fashion”, in Tales from the Folly: A Rivers of London Short Story Collection, JABberwocky Literary Agency, Inc., pages 136-137:",
          "text": "‘Got any more black beauties?’ asked Nigel, who never could separate his biphetamines from his common or garden amphetamines.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Synonym of black bomber (“kind of amphetamine capsule”)."
      ],
      "links": [
        [
          "black bomber",
          "black bomber#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Synonym of black bomber (“kind of amphetamine capsule”)."
      ],
      "synonyms": [
        {
          "extra": "kind of amphetamine capsule",
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "black bomber"
        }
      ],
      "tags": [
        "slang"
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    }
  ],
  "word": "black beauty"
}