a.k.a. Tri Sigma (ΣΣΣ) - these girls are the hottest sorority girls on campus. They beat out all the other sororities and everyone wants to be them. The girls of Sigma Sigma Sigma are gorgeous, smart, and is the girl that every guy wants to be with. They've got class, they've got sass, and they'll surely kick any other girl's ass.

If you're dating a Sigma girl, raise your glass. If you're not, raise your standards.
Frat Boy: Yeah, my girlfriend's in Sigma Sigma Sigmal.

Frat Boy #2: Damn...you lucky dog.
by Fratsense June 24, 2010
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This elite Sorority was founded on April 20th, 1898 in Farmville, VA. Classy and beautiful, Sigma Sigma Sigma women are what all other women strive to become. Other sororities may try to emulate the high standards of the Tri Sigs but, in the end, fail miserably.

Though each campus attracts different types of women, one thing remains the same: Tri Sig ladies are the real deal.
Potential Member 1: I didn't get a bid from Sigma Sigma Sigma.
Potential Member 2: *sobs* Me neither.
Tri Sig: We have standards.
by TriSigHottness July 25, 2006
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A local sorority at Hope College. Known as the Sigma "sluts" when really they just rage the hardest. Every girl is scared of them but secretly every girl wants to be one. Because they are confident, sexy, and just the most bad ass girls around.
"Who are we partying with again?" - boy 1

"The Sigma Sigmas" - boy 2

"oh shit, get ready to rage." - boy 2
by Mel Lepon February 17, 2011
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A pack of rabid harlots bent on destroying every guy they meet's life. Often undereducated and unfaithful the only real thing they have to boast is the carebear. They often find themselves bickering with one another driving at least one person to tears. They are shrewd and crafty, watch out.
Person 1:Did you hear about that last party?
Person 2: Yeah I totally hooked up with three Sigma sigma sigmas!
Person 1:Yeah, it's funny I hooked up with one while her boyfriend was in the next room!

"Tri-Sigma, everyone else has!"
"Tri-pigs are best rooting around in the mud!"
by James Dean Pints April 3, 2009
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A never resting bald headed maverick that keeps coming back when you kill him
"So its you sigma....i knew you'd come back for the 600th time!"
by Uber-Chris May 12, 2003
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a pistol made by smith and wesson just like a glock but less expensive and more reliable
fuck your glock i gotta a sigma
by wardendodger December 23, 2008
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a mysterious place that few dexheads have actually been to, but all seek after. It's the quasi-quivalent to a k-hole with ketamine, but apperantly much harder to achieve.

Much debate resolves around sigma and the existance of a fourth plateau, or if sigma is 4p only in a different setting or if it's a different plateau all together .. or even if it's a plateau at all.
Yeah, I hear sigma is pretty strange, but as far as I can tell, the third just keeps going forever.
by zoey April 11, 2004
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