make book

Verb

make book (third-person singular simple present makes book, present participle making book, simple past and past participle made book)

1. (idiomatic) To gamble, either by placing or taking bets.
   • In the American League, front-running Cleveland was an odds-on favorite with the men who make book on baseball.1954 August 30, “Into the Stretch”, in Time
   • [Connie:] How is Mrs Miller?
     [Mr Miller:] She doesn't understand me.
     [Connie:] I could have made book on that answer.1962, Stanley Shapiro, Nate Monaster, That Touch of Mink
2. (idiomatic) To be very confident; to be sure.
   • Near-synonym: bet one's bottom dollar
   • "Oh, you can make book that she didn't start no love-making. She ain't the kind to curl up in a man's ear and whisper."1909, Rex Ellingwood Beach, chapter 25, in The Silver Horde

   Synonyms:

   bet one's bottom dollar