The term "quite imposing" is often used to describe something that is impressive or significant in appearance or quality. When you add "plus" to the end of the phrase, it suggests that something is not only impressive but also offers additional qualities or features that make it even more so. It could be used to describe a person's impressive appearance and status that is further enhanced by something extra special they possess or their actions. However, the exact meaning can vary depending on the context in which it is used.。