The amount of jiggle a person has depends on a number of factors, including how much fat they have and how much muscle they have. Generally speaking, the more fat someone has, the more jiggly their body will be. However, losing weight (and therefore losing fat) does not always mean that the person's body will become less jiggly. This is because losing weight can also cause someone to lose muscle mass, which can lead to a more jiggly appearance.