booked up

booked up (comparative more booked up, superlative most booked up)

1. (slang) Well-read on a particular topic.
   • 1875, Potter's American Monthly, volumes 4-5, page 359:

     […] 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.

2. (chess, slang) Extremely knowledgeable in a particular opening as a result of intensive study.
   • 2022 March 11, Carsten Hansen, “2022 FIDE Grand Prix Belgrade Semifinals Day 2: Rapport Magic”, in Chess‎:

     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.

   • 2022 July 21, Colin McGourty, “Zagreb GCT 1: Firouzja leads as new chess era begins”, in Chess24‎:

     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.

booked up

1. simple past and past participle of book up