Jamais vu is
deja vu=== feeling of familiarity to a novel stimulus jamais vu==feeling of unfamiliarity to a familiar stimulus Reference.Kaplon and sadock, synopsis of psychiatry, 11th edition, pg No.194
Illusion that what one is hearing, one has heard previously
A unfamiliar thought regarded as repetition of a previous thought
Unfamiliar situations or events feel strangely familiar
Feeling of strangeness to familiar situation
Symptoms and signs in psychiatry and classification