Definitions by Pfu

Runner's Potato 

The sad result of a runner not making it to the bathroom, in time to defecate.

At mile 17 during the marathon, she had hit the wall and obviously not foudn a restroom in time. She was carrying the ole runner's potato, which was not only dribbling down her legs, but left a huge protrusion in her underware.

Runner's Potato by Pfu May 20, 2010