Jamais Vu is a psychological phenomenon where a person feels a sense of unfamiliarity with a situation or experience that should be familiar. It is often described as the opposite of déjà vu, where one feels they have experienced something before. This can occur in everyday situations, such as walking into a room or seeing a familiar face, leading to a momentary feeling of strangeness. This phenomenon can be linked to various factors, including fatigue, stress, or certain neurological conditions. Jamais Vu is not a disorder but rather a temporary state of perception that can happen to anyone, often leaving individuals puzzled by their own reactions.