wrote the book on

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Idioms and Phrases

Knows nearly everything about, as in Ask Dr. Lock; he wrote the book on pediatric cardiology , or I wrote the book on job-hunting; I've been looking for two years . This expression is always put in the past tense. [ Colloquial ; second half of 1900s]

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

wrote wroth

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