"Jamais Vu" roughly translated means "Never seen", "jamais" meaning "never" in French and "vu" being the past participle of "voir", "to see" in French. A more correct form would be "ne vu jamais", or the most correct form being "je/tu/il|elle n'ai/as/a vu jamais", with whatever form depending on first, second, or third person.
"Jamais Vu" roughly translated means "Never seen", "jamais" meaning "never" in French and "vu" being the past participle of "voir", "to see" in French. A more correct form would be "ne vu jamais", or the most correct form being "je/tu/il|elle n'ai/as/a vu jamais", with whatever form depending on first, second, or third person.