Rimathon Share definition Flag Too engage in THE iron man of all sexual marathons, the participant will go on a rampant spree by rimming 26 arseholes in a row! John completed his rimathon in 20 minutes thats an average of an arsehole every 46 seconds! Rimathon by Carse Rack April 6, 2011 0 0 Get merch Get the Rimathon mug. Buy Now — $32.95 See more merch