The term 'Phi Followers' can be summarized as a group of people who follow the teachings of the Greek letter Phi. The term is often used to refer to those who are devoted to the study of mathematics, geometry, and philosophy. The crossword solution for this term is CHIS, which is an acronym for the Greek words 'Chronos, Herakles, Isokrates, and Socrates'. These four figures were influential in the development of the philosophical and mathematical ideas associated with Phi.