33 Girl: You know us too well!
Nationally, Phi Sigma Kappa is known as Phi Sig, just like Phi Sigma Sigma! The only time we ever refer to ourselves as "Kappa", is in reference to the merger and whether a chapter was Phi Sigma Epsilon or Phi Sigma Kappa, and that's usually an internal thing.
In the Midwest, if you say Kappa, it means one of two organizations: Kappa Alpha Psi (NPHC), or Kappa Kappa Gamma.