In psychology, jamais vu ( /ˈʒɑːmeɪ ˈvuː/; from French, meaning “never seen”) is the phenomenon of experiencing a situation that one recognises but that nonetheless seems very unfamiliar.

Often described as the opposite of déjà vu, jamais vu involves a sense of eeriness and the observer’s impression of seeing the situation for the first time, despite rationally knowing that he or she has been in the situation before.

Jamais vu is more commonly explained as when a person momentarily does not recognise a word, person, or place that he or she already knows.