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blue book
noun- in horse racing, a sheet showing the contenders in a day’s races, the odds on the horses and the handicapping US
- — David W. Maurer, Argot of the Racetrack, p. 15, 1951
- a test in school or university US, 1951
From the examination booklets bound in light blue paper used in many US schools and universities. - — Harold Wentworth and Stuart Berg Flexner, Dictionary of American Slang, p. 47, 1960
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