to leave a group of people at random times to masturbate, then come back out of breath and play it off like nothing happened
John: "yo tom! where you at?"
5 minutes later
Tom: " sorry man i was running a marathon"
9π 4π
When you become extreamly intoxicated off of captin morgan and passes out in someones trailer. Then that person is awoken by his friends 3 hours later and goes snowboarding. This is know as Running a Marathon
"i wanna run a marathon" said bones
6π 17π
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"
To successfully lay with a person from each age bracket
He banged a 51 year old and a 46 year old. I think heβs running the marathon