Panties worn by those interested in scatology
, or scat play, for the exclusive purpose of defecating in; a throwaway pair that can be disposed of after using for its intended fetishistic purpose, thus avoiding burdensome cleaning.
(A portmanteau of "shit" and "panties".)
Knowing she was going to scat play later that night, Cheryl put on her shanties in the morning, and had 3 cups of coffee, 2 and-a-half packs of cigarettes, a big lunch, and treated herself to Fiber One bars liberally throughout the day.
Since my hemorrhoid surgery, I have been wearing shanties every day, rather than ruin my silk Victoria's Secret.