Wikipedia
Mid-major
Mid-major is a term used in American NCAA Division I college sports, especially men's basketball, to refer to athletic conferences that are not among the so-called " Power Five conferences" (the ACC, Big Ten, Big 12, Pac-12, and SEC, the programs of which are sometimes referred to as "high majors" by comparison). The term "mid-major" was coined in 1977 by Jack Kvancz, head coach of Catholic University's men's basketball team. Such a distinction is not officially acknowledged by the NCAA, nor does the NCAA use the terms "major" and "mid-major" to differentiate between Division I athletic conferences. It is considered offensive and derogatory by many fans and schools.