"butcher's mourning" meaning in English

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      "expansion": "butcher's mourning (uncountable)",
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  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1855, William Calcraft, The Groans of the Gallows, page 13:",
          "text": "Hats off, down there, you in the white hat and crape — you in the butcher's mourning — bonnet him — silence! Yes, says the Brahmin, the ceremony is about to begin; the national games are about to commence.",
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      "glosses": [
        "A white hat with a black mourning hatband."
      ],
      "id": "en-butcher's_mourning-en-noun-lE2hrkfU",
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        "(UK, slang, obsolete) A white hat with a black mourning hatband."
      ],
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  "word": "butcher's mourning"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        }
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      "glosses": [
        "A white hat with a black mourning hatband."
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        "(UK, slang, obsolete) A white hat with a black mourning hatband."
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  "word": "butcher's mourning"
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