A female with an exceptionally nice ass.

Derived from the term "its a tight race".
"Damn... she has a nice ass"
"Yeah man, she's running the marathon"
by Robert Schinkleheimerjosefinem December 3, 2008
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To successfully lay with a person from each age bracket
He banged a 51 year old and a 46 year old. I think he’s running the marathon
by Walnutted January 18, 2023
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lots of nude pictures sent @ once back and forth with ur fwb
me and Tracey had a nude marathon last night
by coreyssecretadmirer March 8, 2016
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When you go to bed somewhere between midnight and 3 am for no apparent reason than not having to go to work the same morning.
Even if you do have to work the following morning, don't pull a midnight marathon if you aren't exactly sure what you're doing and how to do it safely.
by Sexydimma May 15, 2021
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A sex position where you do a bump of cocaine off of your partner's ass and then fuck them doggy style.
Last night was crazy bro, I finally did The Marathon Runner with Jessica.
by Unicorn Brad October 28, 2021
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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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