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Asian American Interest Social Sorority and one of the most well known asian sorority in California.

Has the downest girls and are always rivaled with alpha kappa delta phi.
Girl 1: Hey are you going to rush kdphi or sopi?

Girl 2: Sigma omicron pi of course
by knowwassup December 22, 2013
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A West Coast Asian interest sorority. Also commonly referred to as, "S-O-Pis". Many of the campuses that sport chapters of SOPi also have a chapter of KDPhi, Alpha Kappa Delta Phi.
"KDPhi, spread your thighs.
SOPis, look like guys." (Sigma Omicron Pi)
by Gordon Lee September 04, 2007
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