I was at the gym and ended up overdoing it on the leg press. I ended up soiling my pants. So I went to the locker room stall and pooped in my underwear to finish off my workout.
I was at the gym and suddenly I had a strong urge to poop. Before I even got to the restroom, the inevitable happened. In front of the mirror in the men's locker room, I was forced to poop in my underwear. The pressure was so great that it created a huge bulge in my shorts.