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also a nickname for Phi Sigma Kappa. Whichever organization was at the school first usually lays claim to this. An alternate term can be PSK or Phi Sig Kap if Phi Sigma Sigma was there first.
Phi Sig was founded in 1873.
by rock lo March 27, 2005
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the largest group of GBF's on earth (gay best friends).... these guys usually throw decent parties, know a lot of girls, and stand back while every other fraternity hooks up with their meat.... they later talk to the girls about how awful womanizing is and that they will be best friends forever.... some have even been reported as the maid of honor at weddings.... luckily, they have other fraternities such as TKE to boost their status at various campuses across the globe....
damn i am glad that casey went phi sig

the only thing worse than going phi sig would be to go TKE

i wish casey had gone TKE instead of phi sig
by rush gamma mu March 18, 2007
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Phi Sig are a national fraternity that is founded on the basis of everyone being exactly the same. They have a large membership because they will hand out a bid to anyone and everyone. The prerequisite to being a Phi Sig is having a trust fund and low self esteem.

Things that are included in your "pledge package":
one backwards white Hurley hat
one gallon of hair gel
one pair of abercrombie vintage jeans
one hollister button up
one pair hollister sandals
one month LA Tan tanning package
one white lavalier

Phi Sig guiding motto: "Now be sure to look and talk exactly like everyone else"
Man, those guys all look exactly the same and they are all wearing Hollister shirts. Oh, their Phi Sigs.
by NIU student April 19, 2007
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