The phrase half chicken is usually used to describe a cooking method in the kitchen. It means to cut a chicken in half and use only half when cooking. It is common that chicken legs and chicken wings are separated, and chicken breasts and the other half of chicken legs are used for other dishes. This practice can be flexibly changed according to different recipes and personal preferences.

In addition, in some places, "half a chicken" can also refer to a practice of sharing food. At a restaurant or family dinner, a chicken is divided into two halves and given to many people.

To sum up, "half chicken" is usually used to describe a cooking method or the practice of sharing food. The specific meaning may vary according to culture and background.