Slang : remarkably good, cool or sophisticated but with an unobtainable or rare quality.
Tween girl may say, "Amarissa's Fendi handbag is so kiev! Did you know her dad is rich and bought it for her Bat Mitzvah?"
Upon seeing a Saleen S281 Supercharged Mustang smoke some rubber at the stoplight, teenage boys may say, "Dude, that car is soooo kiev! I wish my parents would buy me one for graduation."
In college I said, "Girl friend! This kind bud is so kiev that my vinny-van is buzzing for the Flaa-man. Light another one and pass the bon-bons!"