"booked up" meaning in English

{
  "forms": [
    {
      "form": "more booked up",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most booked up",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "booked up (comparative more booked up, superlative most booked up)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1875, Potter's American Monthly, volumes 4-5, page 359:",
          "text": "[…] and we believe the day is usually the one on which the saint is supposed to have died; but this we cannot affirm, as we are not booked up in Roman sanctology.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Well-read on a particular topic."
      ],
      "id": "en-booked_up-en-adj-7wawBez7",
      "links": [
        [
          "Well-read",
          "well-read#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Well-read on a particular topic."
      ],
      "tags": [
        "slang"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Chess",
          "orig": "en:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "24 61 15",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "24 54 22",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "10 74 17",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2022 March 11, Carsten Hansen, “2022 FIDE Grand Prix Belgrade Semifinals Day 2: Rapport Magic”, in Chess:",
          "text": "This line is not by any stretch of the imagination considered a critical line, but it does take the players out of mainstream theory, where Giri typically is hardcore booked up.",
          "type": "quote"
        },
        {
          "ref": "2022 July 21, Colin McGourty, “Zagreb GCT 1: Firouzja leads as new chess era begins”, in Chess24:",
          "text": "Not only that, he managed to get the incredibly well-booked up US-Cuban star out of book on move 8, and then to give checkmate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Extremely knowledgeable in a particular opening as a result of intensive study."
      ],
      "id": "en-booked_up-en-adj-ROgVYQ8z",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ]
      ],
      "raw_glosses": [
        "(chess, slang) Extremely knowledgeable in a particular opening as a result of intensive study."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "booked up"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "booked up",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "book up"
        }
      ],
      "glosses": [
        "simple past and past participle of book up"
      ],
      "id": "en-booked_up-en-verb-GL1L2aNM",
      "links": [
        [
          "book up",
          "book up#English"
        ]
      ],
      "tags": [
        "form-of",
        "participle",
        "past"
      ]
    }
  ],
  "word": "booked up"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English verb forms",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "more booked up",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most booked up",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "booked up (comparative more booked up, superlative most booked up)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English slang",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1875, Potter's American Monthly, volumes 4-5, page 359:",
          "text": "[…] and we believe the day is usually the one on which the saint is supposed to have died; but this we cannot affirm, as we are not booked up in Roman sanctology.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Well-read on a particular topic."
      ],
      "links": [
        [
          "Well-read",
          "well-read#English"
        ]
      ],
      "raw_glosses": [
        "(slang) Well-read on a particular topic."
      ],
      "tags": [
        "slang"
      ]
    },
    {
      "categories": [
        "English slang",
        "English terms with quotations",
        "en:Chess"
      ],
      "examples": [
        {
          "ref": "2022 March 11, Carsten Hansen, “2022 FIDE Grand Prix Belgrade Semifinals Day 2: Rapport Magic”, in Chess:",
          "text": "This line is not by any stretch of the imagination considered a critical line, but it does take the players out of mainstream theory, where Giri typically is hardcore booked up.",
          "type": "quote"
        },
        {
          "ref": "2022 July 21, Colin McGourty, “Zagreb GCT 1: Firouzja leads as new chess era begins”, in Chess24:",
          "text": "Not only that, he managed to get the incredibly well-booked up US-Cuban star out of book on move 8, and then to give checkmate.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Extremely knowledgeable in a particular opening as a result of intensive study."
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "opening",
          "opening"
        ]
      ],
      "raw_glosses": [
        "(chess, slang) Extremely knowledgeable in a particular opening as a result of intensive study."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "booked up"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English non-lemma forms",
    "English verb forms",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "verb form"
      },
      "expansion": "booked up",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "form_of": [
        {
          "word": "book up"
        }
      ],
      "glosses": [
        "simple past and past participle of book up"
      ],
      "links": [
        [
          "book up",
          "book up#English"
        ]
      ],
      "tags": [
        "form-of",
        "participle",
        "past"
      ]
    }
  ],
  "word": "booked up"
}