half marathon 

a running race that is half the distance of a marathon, i.e. 13.1 miles

person 1 "Hey I saw you running yesterday! Are you on cross country or something?"
person 2 "Yeah, but we don't race more than a few miles at cross country, I'm training for a half marathon"
person 1 "Wow, that's a lot of running!"

half marathon by arunner August 23, 2012

Half Marathon 

A sexual position where a female clings upside down to a male's front and sucks his genitalia (or a blowjob ) whilst he runs on the spot. If said female chokes or is sick, this is known as a Paula Radcliffe.

Cat: want to try some sick new sex moves tonight?
Matt: sure, like what?
Cat: the half marathon?
Matt: sounds like fun!

Half Marathon by thegingerfurby December 11, 2011

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