The area between a person's(male and female) legs; the crotch, the groin, the area where reproduction and the removal of bodily wastes occurs.
1.During cheerleading practice, while Jennifer was performing a cartwheel and the crotch of her outfit accidently slipped aside revealing her nether regions, little did she realize that Mick, who was jogging on the track nearby, caught sight of her wardrobe malfunction and suddenly had the irresistable urge to chuck it in her.*a few days later...*
2.When poor ol' Mick accidently dropped the soap while using the prison shower, he had to bend over to pick it up, but this put his ass and nether regions into view, giving the other boys upstate a grand opportunity to tailpipe him and ram his shit in the wrong direction.