Egoism is when a person puts their own needs and wants before anyone else's. It means that they act in ways that make them feel good or help them get what they want, even if it may not be good for the other people around them. For example, if a child wants a toy, they may ask their parents for it and then act upset when they don't get it. This is an example of egoism because the child put their own need—the toy—over the needs of their parents.