It means not eating fruits after your meals! Fruits should be eaten in an empty stomach, for it plays a major role to detoxify your system, supply you with a great deal of energy for weight loss and other activities. Let's say you eat two slices of bread and then a slice of fruit. The slice of fruit is ready to go straight through the stomach into the intestines, but is prevented from doing so. In the meantime the whole meal rots, ferments and turns to acid. The minute the fruit comes into contact with the food in the stomach and digestive juices, the entire mass of food begins to rot.