Phi Sigs is a nickname which might refer to members of either: Phi Sigma Kappa (ΦΣΚ) Men's Social Fraternity Phi Sigma Epsilon (ΦΣΕ) Men's Social Fraternity, which merged into Phi Sigma Kappa in 1985 Phi Sigma Sigma (ΦΣΣ) Women's Social Sorority