A sorority of easy girls that usually snort lots of coke. Called "Pi Phi" for short.

Pi Beta Phi is Fraternity for Women whose mission is to promote friendship, develop women of intellect and integrity, cultivate leadership potential and enrich the lives of members and their communities.

a group of women who are smart, loyal, hardworking, trustworthy, classy, absolutely beautiful, and always looking for a good time; basically a combination of every aspect a guy would want to marry and every girl would like to be.
When you meet a Pi Phi, you realize immediately that there's something unique about her. There's an unmatched level of integrity and commitment to excellence, and a general aura of potential that sets this person apart from the pack. That's because she's a Pi Phi through and through and a member of a premier organization for women.