“What’s it called when you run 26.2 miles in underwear?”/“A marathong.”

“Marathong” (marathon + thong) is an infrequently used marathon joke word. “Marathong? Running in a thong?” was posted on Twitter on March 14, 2010. “I just invented a race where chicks run 26 Miles in skimpy underwear: The Marathong” was posted on Twitter on November 7, 2010.
 
         
Google Groups: rec.running
Ran 11 miles in a thong
Bill
6/21/04
A bunbathing marathong.
 
Twitter
George Hughes, Jr.‏
@buzzmuzic
Marathong? Running in a thong? 😊 RT @MaggieRocksHou: Ran 2 miles in 21 min and felt good. Back in2 the Half marathong training I go! 4 wks!
7:16 PM - 14 Mar 2010
 
Twitter
Sir Focal Scans‏
@rawsclafani
I just invented a race where chicks run 26 Miles in skimpy underwear: The Marathong.
8:28 AM - 7 Nov 2010
 
Twitter
Ben Olson‏
@MachoDeMacho
Victoria’s Secret introduces the Marathong. 26.3 miles of thong. That’s a whole lotta thong.
8:56 AM - 6 Nov 2011
 
Twitter
Tracie Hendricks‏
@feyble
Yes I said MaraTHONG cause when I run 26.2 miles my underwear shoot right up my ass(everytime)
3:18 PM - 6 Nov 2011
 
Twitter
Judge‏
@thesportsjudge
I wanna create a race where people run 26 miles wearing undergarments. #Marathong
7:18 AM - 5 May 2013
 
Twitter
Dave‏
@gneicco
By the time you’re done running the 26 miles the liner in your shorts has become a marathong.
1:28 PM - 20 May 2013
 
Twitter
John Walling‏
@johnwalling
Marathong Man ran 26 miles wearing a brief Speedo.
8:24 PM - 10 Mar 2015
 
Twitter
josh haness‏
@fuzzyjosh
If you run 26.2 miles in a G string that is known as a marathong..
7:14 PM - 13 Nov 2015
 
Reddit—3am jokes
What’s it called when you run 26.2 miles in underwear? self.3amjokes
Submitted August 27, 2017 by JacobS925
A marathong