Tri Sigma, or Sigma Sigma Sigma, is a sorority of women who are regarded across the nation as role models for their communities.

With over 100,000 members worldwide, Tri Sigmas are well-known for their class and charisma. They uphold the values of power, wisdom, faith, hope, and love in all they do.

On college campuses, Tri Sigmas are usually recognized for being extremely involved in other extra-curricular activities and extremely academically successful.

Unlike other sorority girls, Tri Sigmas place a high emphasis on sisterhood, service, school, family life, spirituality, and leadership. While partying is a facet of any sorority, it plays second fiddle for Tri Sigmas, who usually have enough on their plate making the world a better place!

Tri Sigmas are well-known for being some of the most attractive girls across the nation, as well as the most genuine and likable. For this reason, fraternity members and/or athletes often select Tri Sigmas as their dates of choice for social events.

Tri Sigmas are certainly the best of the sorority women. Many who are denied a bid from Tri Sigma rush another sorority unhappily or wait patiently to see if they can eventually be chosen for the select few.
Q: "Do you think that Ashley'll go out with me?"

A: "She's a Tri Sigma. That automatically makes you not good enough."
by Michael F.R. June 29, 2011
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(noun): contraction of two entities: “Triathlon” and “douche-bag”. A tri-bag is a human being, male or female, who defines their existence based on the next triathlon or training for a triathlon they will undertake. Tri-bags typically struggle maintaining relationships with other human beings unless they are tri-baggers as well. Hence tri-bags tend to hang out together and compare notes on their “strokes”, “breathing”, and which model of Subaru they will purchase next. Tri-bags are usually fairly easy to spot and identify. Sometimes they are confused with “cross-bags”, their cross-fit counterparts.

Some signs of a tri-bag:

1) Within the first 3 sentences of a conversation they mention that they have or will participate in a triathlon.
2) Ironman logo is prominently tattooed on their one of their calves (it doesn't have to be on the calf but this seems to be the preferred location – look here first)
3) They drive a Subaru (this is probably a 20% chance of being a tri-bag)
4) They drive a Subaru with a “26.2” sticker in the rear window (~74% chance now)
5) They drive a Subaru with a bike racks and a “70.3” or a “140.6” (99% chance – only reason this is not 100% chance is that the person driving the car could be the disgruntled spouse or emotionally neglected teenage child using vehicle).
6) They drive any other vehicle with “70.3” or a “140.6” (>90% chance)

7) Their bicycle cost more than the GDP of Ireland.
I went to John’s party last night. I couldn’t find a place to park; Subarus were ubiquitous in the surrounding area. Once I got inside, it was full of tri-bags taking baby-sips of craft beer and comparing “strokes.”

or
I really wanted to take up swimming but I could got too annoyed with all the tri-bags at the pool so I became a cross-bag instead.
by tgrbld April 6, 2015
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awesomeness that transcends beyond even Charlie Sheen's level.
Guy 1: "Charlie Sheen may be bi-winning, but I'm tri-winning!"
Guy 2: "What did you do?"
Guy 1: "I raced a dozen cop cars and won!"
Guy 2: "Thuggin'!"
by Da Sperminator June 19, 2011
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The tri-town includes Plainville, Wrentham, and Norfolk and shares the same high school, King Philip Regional, which has caught on fire twice in the past two years. The only things to do in the tri-town is drinking, drugs, and banging.
Hey, dont you wish you lived in the tri-town so you could get drunk and screw?
by NHass December 23, 2005
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the definition of someone who will "try" anything sexual.
person 1 : whats your sexual preference?

person 2 : hey man i'll do anything, im TRI-SEXUAL
by David Towle June 3, 2004
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When three people jizz on your face.
Everyone thought Wendy was the innocent type until she got a tri-facial round the back of Chuck E Cheese.
by Plato's Second Son June 8, 2010
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A Tris-Blig is technically fecial matter covered in the inner anus' blood. Known in slang as a "cherry raisin", a Tris can be devistating to any sufferer of Bligovtrophy.

First noted by Sir Christopher Jenkins J. Bligh esq. in the English city of Morecombe, as peasents scuttled down the side-streets and alley-ways holding handfuls of bloody human excrement after a chimp had infected the local water source with is gangernous elbow. Sir C. Bligh was rumoured to .... and I quote "Oh Winston, looks like they are dabbling in the devil's period. Oh the horrors, but its gruesomely funny"

Videos of such a disease exist, naming for example 1 man 1 jar.

A Tris-Blig is not to be mistaken with a Bris-Tlig!
Benedict - Oh poppycock Alfred, I seem to have acquired a small case of Tris-Blig!

Alfred - Sir, I......, what on Earth have you been doing?.... There is blood everywhere!!! Its down the back of your long-johns!!! And the smell is unphathomable!!! Joseph, Mary and Jesus in a shoe box, how did this happen?? Its even on the hall curtains!!!

Benedict - I do not feel, how you say, over the moon?

Alfred - ......
by Caffo January 27, 2011
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