The term "full game" is commonly used in sports, particularly basketball and football. In its most basic sense, a full game refers to an entire contest between two teams or players, from start to finish. However, it can also be interpreted as playing with intensity and focus for the duration of the match, rather than just showing up and going through the motions until the end.
In basketball, for example, a player may be described as "playing a full game" if they are consistently engaged and productive throughout the entire contest, rather than having periods where they coast or become disinterested. Similarly, in football, a team that plays with intensity and determination from start to finish is often said to have played a "full game."
Overall, the phrase "full game" can be used to describe a level of commitment and effort that extends throughout an entire contest, rather than just being present for part of it.