"good black don't crack" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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          "word": "black don't crack"
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      "examples": [
        {
          "ref": "2010, Timothy M. Gay, Satch, Dizzy, and Rapid Robert",
          "text": "“Good black don't crack,” the late Buck O'Neil liked to joke when people complimented Buck's appearance.",
          "type": "quotation"
        },
        {
          "ref": "2011, J. Marie Darden, Finding Dignity, page 86",
          "text": "Big Melba says those light ones age quickly and poorly, but good black don't crack.”",
          "type": "quotation"
        },
        {
          "ref": "2015, April Sinclair, Coffee Will Make You Black: A Novel",
          "text": "“Chile, good black don't crack.” Grandma smiled.",
          "type": "quotation"
        },
        {
          "ref": "2016, Noelle Vella, A Weekend Affair",
          "text": "“You're forty?” I looked him up and down. Damn, forty was looking like that these days? I thought. I guess the old adage good black don't crack was real.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of black don't crack"
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      "id": "en-good_black_don't_crack-en-phrase-QF5pE06y",
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  "word": "good black don't crack"
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      "expansion": "good black don't crack",
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  "lang_code": "en",
  "pos": "phrase",
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          "word": "black don't crack"
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      "examples": [
        {
          "ref": "2010, Timothy M. Gay, Satch, Dizzy, and Rapid Robert",
          "text": "“Good black don't crack,” the late Buck O'Neil liked to joke when people complimented Buck's appearance.",
          "type": "quotation"
        },
        {
          "ref": "2011, J. Marie Darden, Finding Dignity, page 86",
          "text": "Big Melba says those light ones age quickly and poorly, but good black don't crack.”",
          "type": "quotation"
        },
        {
          "ref": "2015, April Sinclair, Coffee Will Make You Black: A Novel",
          "text": "“Chile, good black don't crack.” Grandma smiled.",
          "type": "quotation"
        },
        {
          "ref": "2016, Noelle Vella, A Weekend Affair",
          "text": "“You're forty?” I looked him up and down. Damn, forty was looking like that these days? I thought. I guess the old adage good black don't crack was real.",
          "type": "quotation"
        }
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        "Alternative form of black don't crack"
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  "word": "good black don't crack"
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