Common
Inside baseball (metaphor)
American slang for minutiae of a system
American slang for minutiae of a system
In North American slang, the term inside baseball refers to the minutiae and detailed inner workings of a system that are only interesting to, or appreciated by, experts, insiders, and aficionados. The phrase was originally used as a sports metaphor in political contexts, but has expanded to discussions of other topics as well. Language commentator William Safire wrote that the term refers to details about a subject that require such a specific knowledge about what is being discussed that the nuances are not understood or appreciated by outsiders.
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