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.
by Philosophistry February 15, 2009
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Watching a vast amount of movies and/or tv shows throughout a day, usually the trilogies, and or Disney movies.
" What you gunna do this weekend?"
Prolly just sit home marathoning the Star Wars movies"
by xdeezy March 23, 2010
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This is basically the concept of running a marathon with your penis. This can either be done solo (lubricant advised) or with a partner. The idea is to gain enough endurance and strength so that you can go a long way in such a small environment.

First we must define what a "marathon" is; a marathon is the longest considered running competition where competitors run 42195 meters. With our penis, this will feel like an eternity. Here we define the formula to find out how many strokes are needed for a complete marathon run. We assume there is no friction and the receiving party is eligible to take in the whole mass and length of the penis.

Strokes needed = 42195000/(penis length(cm)*2)

For example, a penis with a length of 15 cm, will need to stroke (in and out, or for single player experience up and down) for 140650. Since strokes are integers, if your solution is a non-integer number, round up.

Researches are developing in the area of sportive sex acts more and more.
A: Hey girl! You look tired? Didn't you sleep last night?
B: Almost no sleep. C insisted to try for marathoning again.

A: Damn girl! Did he at least finish the run?
B: He achieved a 67% finishing rate this time.
A: I hope you make it to olympics this year.
B: Thank you.
by ohmmmmmmm November 08, 2017
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An act, such as a running race or sex, engaged in for a very long time, i.e. at least several hours.
He's been in his room watching the Andy Griffith Show marathon; he ain't comin' out.
by LudwigVan November 13, 2003
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to watch an entire season of a TV series in a short period of time, especially if you watch them in one sitting.
I just got the last season of Lost on DVD, and I had to marathon it last weekend. I couldn't put it down.
by Philosophistry January 31, 2009
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When a woman is undoubtedly flattered by a charming man, she experiences the symptoms of Marathonitis. Symptoms include uncontrollable smiling, giggling, nervousness, and many similar feelings related to flirting. There is no cure for Marathonitis. Once you have acquired Marathonitis, there is no turning back.
Boy: You look adorable this evening Kitty!
Girl: *blushes* Thanks Puppy :)
Boy: I think you just caught the Marathonitis ;)
by Christaky December 29, 2011
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A footrace of 42.195 kilometres, which is usually held on roads. It's featured at the Olympics and the World Track and Field Championships. The race was borne out of the death of Greek army messenger Pheidippides, who ran from village of Marathon to Athens to inform the Athenians of the Greek's victory over the Persian army. Pheidippides died upon delivering the message.
"Haile Gebrselassie clocked a world record 2 hours, 4 minutes, and 36 seconds at the Berlin Marathon."
by Alex26 December 03, 2007
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