"square john" meaning in English

{
  "forms": [
    {
      "form": "square johns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "square john (plural square johns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "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"
        }
      ],
      "examples": [
        {
          "ref": "1987, John Irwin, The Jail: Managing the Underclass in American Society, page 38:",
          "text": "Occasionally reputable persons, or \"square johns,\" commit a felony of the type that leads to arrest […]",
          "type": "quote"
        },
        {
          "ref": "2017, David Musick, Kristine Gunsaulus-Musick, American Prisons: Their Past, Present and Future, page 27:",
          "text": "Like thieves, square johns are a shrinking proportion of the American inmate population.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A prisoner who generally obeys the rules and avoids trouble."
      ],
      "id": "en-square_john-en-noun-wzQAN662",
      "links": [
        [
          "prison",
          "prison"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "prisoner",
          "prisoner"
        ],
        [
          "obey",
          "obey"
        ],
        [
          "rule",
          "rule"
        ],
        [
          "trouble",
          "trouble"
        ]
      ],
      "raw_glosses": [
        "(prison slang) A prisoner who generally obeys the rules and avoids trouble."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "square john"
}

{
  "forms": [
    {
      "form": "square johns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "square john (plural square johns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English prison slang",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1987, John Irwin, The Jail: Managing the Underclass in American Society, page 38:",
          "text": "Occasionally reputable persons, or \"square johns,\" commit a felony of the type that leads to arrest […]",
          "type": "quote"
        },
        {
          "ref": "2017, David Musick, Kristine Gunsaulus-Musick, American Prisons: Their Past, Present and Future, page 27:",
          "text": "Like thieves, square johns are a shrinking proportion of the American inmate population.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A prisoner who generally obeys the rules and avoids trouble."
      ],
      "links": [
        [
          "prison",
          "prison"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "prisoner",
          "prisoner"
        ],
        [
          "obey",
          "obey"
        ],
        [
          "rule",
          "rule"
        ],
        [
          "trouble",
          "trouble"
        ]
      ],
      "raw_glosses": [
        "(prison slang) A prisoner who generally obeys the rules and avoids trouble."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "word": "square john"
}