make book

make book idiom
Accept bets on a race, game, or contest, as in No one's making book on the local team. This expression uses book in the sense of “a record of the bets made by different individuals.” [Mid-1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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