"Shaking head" is a common nonverbal gesture where a person moves their head side to side. This action often signifies disagreement, disapproval, or a negative response to a question or statement. It can also indicate confusion or uncertainty, depending on the context in which it is used. In many cultures, shaking the head is universally understood as a way to communicate that something is not acceptable or that one does not agree with a particular idea. This gesture can be seen in various situations, from casual conversations to formal discussions, making it an important aspect of human communication.