According to the search results, "pinch and roll" refers to a technique used by men to itch their scrotum. The area in and around the testicles is very sensitive to harsh forces, so men cannot just scratch their scrotum. Instead, they use the pinch and roll technique, which involves pinching the skin of the scrotum between the fingers and rolling it back and forth to relieve the itch. A video on YouTube shows a demonstration of this technique.