Definitions by Michael Kashmoney

sad trail 

A large patch of hair that grows along the lower back above one's buttocks region.

Your sad trail tends to make others unhappy.

"Faisal and Akram marveled at the sight of Michael's sad trail in Dykstra's common bathroom. They became unhappy and urged him to wax."

sad trail by Michael Kashmoney January 3, 2008