take a leaf out of someone's book

Slang Dictionary

leaf definition

  1. n.
    cocaine. (Sometimes with the. Cocaine is extracted from the leaves of the coca plant.) : The entire shipment of leaf was seized by the feds.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw-Hill Education.
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American Heritage
Idioms & Phrases

take a leaf out of someone's book

Imitate or follow someone's example, as in Harriet took a leaf out of her mother's book and began to keep track of how much money she was spending on food. This idiom alludes to tearing a page from a book. [c. 1800]

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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