In 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.[1][2] The phrase was originally used as a sports metaphor in political contexts, but has expanded to discussions of other topics as well.[1] 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.[3]