The term "Hoosier hysteria" is not widely recognized as an established concept in academic, historical, or cultural encyclopedic sources. Reliable references documenting this phrase as a defined phenomenon are not confirmed.
The term appears to be a colloquial or informal expression, potentially derived from the state nickname of Indiana—“the Hoosier State”—and the word “hysteria,” often used to describe widespread excitement or emotional reaction. It could plausibly be used to describe intense public enthusiasm, particularly in the context of Indiana’s prominent high school basketball culture, sometimes referred to as "Hoosier" pride. However, accurate information regarding its formal usage, origin, or historical context is not confirmed.
Due to the lack of verifiable sources and standardized definition, "Hoosier hysteria" does not meet the criteria for inclusion as an encyclopedic entry with authoritative standing.