The act of staying awake for an unusually long stretch of time. It generally becomes a life marathon after you've been awake for a full 24 hours.
Sorry if I'm a little spacey, I'm in hour 30 of a life marathon right now.

I have work, 2 papers due, and a wedding to go to. I'm going to have to pull a life marathon.
by sangreazul December 21, 2010
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When you stay on a piece of cardio equipment far longer than you normally would have to keep someone from turning the TV in from of you to Fox News
"Man, I was on that elliptical trainer for an hour doing s Gym Marathon just so no one would tune the TV onto Fox News."
by da Chetster February 20, 2018
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When you're so charged after a sesh you opt out of a cab and just run home full speed.
"How did you get home last night?" "Had a Glaswegian Marathon run on the way home and didn't have money for an uber anyways."
"How yoos get home last night, was alright?" "Had a Glasgae Marathon runner on the way home and dinae have money for an uber anyways."
by osuiqueue May 11, 2019
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Hitting a blunt, pipe, and a bong all in one breath.
"You see Alden hitting all three of those?!" "Yeah, he's fucking up The Marathon"
by bigbaby420 October 08, 2013
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A drinking game where a cup of beer is set up then a shot of rum then a shot of vodka then a shot of tequila and finally another cup of beer.

All must be drunk in a row. Completion demonstrates a drinker's Iron Liver.
John: Dude you were totally F@%$#@ up last night.

Joe: I know man I was in the marathon.

John: Howdya do though?

Joe: Oh I've got an Iron Liver for sure.
by TheIronLiver April 21, 2009
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