"in like Flynn" meaning in English

{
  "etymology_text": "Perhaps referring to Errol Flynn, Australian actor known for womanizing, or Edward J. Flynn, successful campaign manager for Franklin D. Roosevelt.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "in like Flynn (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "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": "2009 June 4, Michael Wolff, “The Power and the Story”, in Vanity Fair:",
          "text": "[Robert] Gibbs is perfectly affable and even, in his way, courtly. And yet he seems to be not quite listening. Nothing touches him. This is no doubt partly because everybody understands he's in like Flynn.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Having achieved a goal or gained access as desired."
      ],
      "id": "en-in_like_Flynn-en-adj-zWxi6nCE",
      "raw_glosses": [
        "(slang, originally US) Having achieved a goal or gained access as desired."
      ],
      "tags": [
        "not-comparable",
        "slang"
      ],
      "wikipedia": [
        "Edward J. Flynn",
        "Errol Flynn",
        "Franklin D. Roosevelt",
        "My Wicked, Wicked Ways",
        "in like Flynn"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-in like Flynn.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/En-au-in_like_Flynn.ogg/En-au-in_like_Flynn.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/c/c8/En-au-in_like_Flynn.ogg"
    }
  ],
  "word": "in like Flynn"
}

{
  "etymology_text": "Perhaps referring to Errol Flynn, Australian actor known for womanizing, or Edward J. Flynn, successful campaign manager for Franklin D. Roosevelt.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "in like Flynn (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "American English",
        "English adjectives",
        "English entries with incorrect language header",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English rhyming phrases",
        "English slang",
        "English terms with quotations",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "2009 June 4, Michael Wolff, “The Power and the Story”, in Vanity Fair:",
          "text": "[Robert] Gibbs is perfectly affable and even, in his way, courtly. And yet he seems to be not quite listening. Nothing touches him. This is no doubt partly because everybody understands he's in like Flynn.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Having achieved a goal or gained access as desired."
      ],
      "raw_glosses": [
        "(slang, originally US) Having achieved a goal or gained access as desired."
      ],
      "tags": [
        "not-comparable",
        "slang"
      ],
      "wikipedia": [
        "Edward J. Flynn",
        "Errol Flynn",
        "Franklin D. Roosevelt",
        "My Wicked, Wicked Ways",
        "in like Flynn"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-in like Flynn.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c8/En-au-in_like_Flynn.ogg/En-au-in_like_Flynn.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/c/c8/En-au-in_like_Flynn.ogg"
    }
  ],
  "word": "in like Flynn"
}