The phrase "lying down roll over" refers to a specific movement or action that a person or animal may perform while in a horizontal or prone position. There are several synonyms that can be used to describe this action, including "turning over", "flipping over", "rolling onto one's side", "rolling onto one's back", and "changing position". These phrases can be used interchangeably to describe the movement of an individual or animal from one position to another while lying down. Whether it is a casual movement during sleep or a trained behavior in animals, there are many ways to describe the action of "lying down roll over".