the 2013 formula 1 chinese grand prix became a klagmire when the soft compound pirelli tires degraded in less than 10 laps
when the parts of a paved race circuit outside of the driving line become covered in rubber worn off from the racer's tires
"the 2013 formula 1 chinese grand prix became a klagmire when the soft compound pirelli tires degraded in less than 10 laps" What is the definition of "klagmire"?