trilathon 

(1) a tripartite marathon, not to be confused with triathlon (a more or less grueling athletic competition featuring three athletic events and accompanying outfits) or, for that matter, biathlon (which combines two--often hilariously unrelated--athletic disciplines), neither of which has anything to do, at least etymologically, with a marathon (a long distance running event or anything that takes really long and tests the limits of human endurance--and boredom), after a Greek city by that name;
(2) the viewing of a trilogy, often a movie trilogy, in one sitting (with optional intermissions and other, more informal, interruptions);
(3) the viewing of the Lord of the Rings trilogy in one sitting.

Hey, wanna come over to for a LOTR trilathon this weekend?
I'm training for a trilathon next month.
A How to Train Your Dragon bilathon sounds like a great idea. Let's do it!

trilathon by mdsquared March 17, 2015

William and Mary Triathlon 

A tradition at William and Mary in which students go streaking in the Sunken Gardens (the central quad), go swimming in the Crim Dell (an algae-filled pond), and jump over the wall of the Governor's Palace (a building in Colonial Williamsburg) at night. Truly daring students do all of this naked.

Johnny: Dude, I saw you and your girlfriend naked in the Sunken Gardens last night!
Eric: Yeah man, we were doing the William and Mary Triathlon! Right after that, we went skinny-dipping in the Crim Dell!

William and Mary Triathlon by naked streaker May 31, 2018

Spanish Triathlon

An athletic endurance competition for couples comprising of three consecutive events. The two participants usually engage in the first two events, drinking & eating simultaneously over lunch or dinner. This is always then followed by no less than 36 hours of nonstop sexual intercourse with only brief pauses for the periodic consumption of more food and drink.

Originally inspired by the legendary Ironman Triathlon held every year in Hawai'i consisting of a 2.4 mile (3.9 km) swim, 26.2 mile (42.2 km) marathon run and 112 mile (180 km) bike race. Its current usage however has come to be a reflection & demonstration of the legendary sexual prowess of the normal Hispanic male or female.

Joe: Hey Luis! Wanna come to the beach with us this weekend?
Luis: Sorry man, I'm preparing Allison for her first Spanish Triathlon beginning this Friday night.
Joe: Oh shit dude, you're a total fucking Ironman!
Luis: Please save it Joe, I'm just getting started. Just wait till I really decide to break her in half!

Spanish Triathlon by Philolingua March 11, 2009

triathlon 

One of the best and most addicting forms of competition consisting of swimming, cycling, and running all at varying degrees of distances. Triathlon is not for the weak, for it puts the athlete in an undescribeable amount of pain, but when the race is over, you want to do it again. Anyone who downplays the difficulty of a triathlon or the classification of it as a sport should be beaten.

I did my first triathlon last summer, and I have since been addicted.

triathlon by nirvanarageatm December 12, 2004

triathlon 

a modern endurance sport, consisting of swimming, cycling and running, in that order.

triathlon by Henri August 5, 2003

jewish triathlon 

A misnomer, this social activity consists of three elements - whirlpool, sauna, steam room. The jewish triathlon frequently occurs at luxury gyms in large, urban areas.

Those guys aren't here to workout. They're here to pickup women and go for the gold in a jewish triathlon.

jewish triathlon by PeddyofEBC December 2, 2010

triathlon widow

Spouse of a triathlete.

A triathlete is any person who was once human, but has now transformed into something super-human, and can no longer hang out with other mere mortals. They must spend all their spare time swimming, biking, running, and shaving themselves in order to keep their new-found sport god status. During this time, they are technically still married, but their wife/husband considers them dead due to their lack of normal human function.
Note: The spouse is only considered a triathlon widow during the time the triathlete is wasting all their spare time spent training, racing, shaving, or thinking about their multi-sport addiction in general.

I'm a triathlon widow this weekend. My husband is gone from our family for 3 days to do an Iron Man race 5 states away. Yes, he had to pay to be in it, and no he does not win anything.

triathlon widow by Triathlon Widow October 1, 2009