my fellow passengers on the elevator looked at me with disgust and crinkled their noses--my darn crotch rot was acting up again
the filmy, dark and smelly substance that accrues within the general area of one's genitalia
"my fellow passengers on the elevator looked at me with disgust and crinkled their noses--my darn crotch rot was acting up again" What is the definition of "crotch rot"?