Marathoner 

A person who has run more than 6 marathons, and/or has shit themselves during at least two races

Wow, Prancis finally became a marathoner

Marathoner by Janet Butterworth November 4, 2023

pussy marathoner 

A female who moves incredibly slow while dating and treats her pussy like It’s a prize at the end of a marathon. Often only wanting to go out once a week for weeks at a time and no signs or expectations of sex.

Hey Carl, you still talking to that Jenna girl?
Naw man, I had to cut her loose. She was a pussy marathoner & I'm not running.

pussy marathoner by 2LunchTommy September 6, 2020

Once a Marathon Match 

Based on the 11 hour 5 min match at Wimbledon featuring Nicholas Mahut (FRA) and John Isner (USA) where they played 138 games in the fifth set alone and where most records were completely shattered.
It refers to anything an event or oddity that will almost positively never happen again.

The strange disappearance of an entire civilized city in Mexico was a once a marathon match

Once a Marathon Match by akararules June 27, 2010

Biman Half Marathon 

When someone exploits and harasses professional and amateur athletes as a marketing stunt.

The way they are treating the runners, I'd say they really pulling another biman half marathon stunt.

Biman Half Marathon by MrRunner January 18, 2022

Masturbation Marathon 

An exceptionally long episode of masturbation fits. These episodes are usually brought on by sexual deprivation and bordom; however, and I'm not making this up, they have been used a means of fundraising for sexual related causes such as safe sex. A masturbation marathon is a strenuous event that requires disciplined training and preparation. There are several related subcatagories such as time, ejaculation distance, and most orgasms for both male and female competitors (I'm totally serious - google it).

Hillary's return brought an end to Bill's 72 hour masturbation marathon.

Masturbation Marathon by Face_Bones August 29, 2013

marathoning 

Watching an entire season of a TV series in a short period of time, especially if you are watching it in one sitting.

Hey, I can't come out tonight. I just got the last season of Lost on DVD, and I'm marathoning it right now. I can't put it down.

marathoning by Philosophistry February 15, 2009

NCIS Marathon

Something of a daily occurance, NCIS is a great show and it seams its so great that they have "Marathon's" almost everyday. Do not get sucked in as these last for 12-24 hours and you will get nothing done.

Person 1: I'm going to work on my project *walks into TV room* EWWW!!! NCIS Marathon! *Two hours later*: Shit I got nothing done!

In short don't get sucked in.

NCIS Marathon by CTU_FieldAgent200 February 15, 2010