"red 'un" meaning in English

{
  "forms": [
    {
      "form": "red 'uns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red 'un (plural red 'uns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English Thieves' Cant",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Arthur Morrison, Chance of the Game\nBut if the clock was a red 'un, and the opportunity undoubted; to be pinched in the Bow Road merely might well imply loss of caste in the mob, but nobody need be ashamed to be pinched anywhere for a gold watch, after all."
        },
        {
          "text": "R. Austin Freeman, A Savant's Vendetta\n'Do you know a jerry when you sees one — a red 'un, mind you?' […] The fellow looked furtively at the door and then, diving into an inner pocket, pulled out a handsome gold watch with a massive chain attached, exhibited it for a moment and then dropped it back."
        }
      ],
      "glosses": [
        "A gold watch."
      ],
      "id": "en-red_'un-en-noun-q2oGCkkO",
      "links": [
        [
          "gold",
          "gold"
        ],
        [
          "watch",
          "watch"
        ]
      ],
      "qualifier": "thieves' cant",
      "raw_glosses": [
        "(UK, obsolete, thieves' cant) A gold watch."
      ],
      "tags": [
        "UK",
        "obsolete"
      ]
    }
  ],
  "word": "red 'un"
}

{
  "forms": [
    {
      "form": "red 'uns",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "red 'un (plural red 'uns)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English Thieves' Cant",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with obsolete senses",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "Arthur Morrison, Chance of the Game\nBut if the clock was a red 'un, and the opportunity undoubted; to be pinched in the Bow Road merely might well imply loss of caste in the mob, but nobody need be ashamed to be pinched anywhere for a gold watch, after all."
        },
        {
          "text": "R. Austin Freeman, A Savant's Vendetta\n'Do you know a jerry when you sees one — a red 'un, mind you?' […] The fellow looked furtively at the door and then, diving into an inner pocket, pulled out a handsome gold watch with a massive chain attached, exhibited it for a moment and then dropped it back."
        }
      ],
      "glosses": [
        "A gold watch."
      ],
      "links": [
        [
          "gold",
          "gold"
        ],
        [
          "watch",
          "watch"
        ]
      ],
      "qualifier": "thieves' cant",
      "raw_glosses": [
        "(UK, obsolete, thieves' cant) A gold watch."
      ],
      "tags": [
        "UK",
        "obsolete"
      ]
    }
  ],
  "word": "red 'un"
}