The term JAMAIS VU in psychology is borrowed from the French language and means ‘never seen’ in English. It refers to the phenomenon in which the observer experiences a situation, which is although familiar to him or her, suddenly seems very unfamiliar as if being seen or experienced for the first time. Jamais vu is often described as the opposite of another phenomenon called deja vu, which refers to the feeling of having already experienced what is happening at present. Involving a sense of strangeness, Jamais vu gives the observer an impression of seeing something for the first time in spite of being rationally aware of having seen or been in the situation before. This phenomenon can be easily created by writing or saying a specific word out loud several times. After a few seconds one will feel that the word sounds weird and unfamiliar and that it makes no sense.