"Little shavers" is a colloquial term typically used to refer to children or young individuals. However, there are a plethora of antonyms that could be used to describe them, depending on the context. For instance, older individuals could be used in place of little shavers, or even more formally, adults. Similarly, words such as mature, experienced, knowledgeable, and seasoned could be used to describe individuals who are not little shavers. Other antonyms that could be used include grown-ups, seniors, elderly individuals, and veterans. Therefore, it is important to consider the context in which the term is used to determine the appropriate antonym to use.