Thrants
A pair of pants with three leg holes/ pant legs; all 3 of the pant legs look the same. Leg holes cannot be used for anything other than legs or replications of legs. They're specially made for people with 3 legs.
Person1: Woah! Do you see that guy over there? He has three functioning legs!
Person 2:Yeah... he has to wear thrants instead of pants.
Person 2:Yeah... he has to wear thrants instead of pants.