As an adjective, it can be used to describe an amazing achievement or something that is exceptionally amazing, grand, or beautiful. Few can be described as a "Ji Hyon" because of the grandeur of the word.
Also, the word Ji Hyon can be used when you say someone has been "Ji-Hyon'd" This means that a Ji Hyon or very Ji Hyon like person has caused someone to change and dedicate their lives to a cause because they have been influenced by a Ji Hyon.
"How could I not? She's so attractuve! DAYUMMM"
"Wow.. that's a Ji Hyon wallet!"
"I know.. the best brand out there!"
"Yeah... I've been Ji Hyon'd...
It's because she's a Ji-Hyon...
DUDE wow that was amazing!
Did you see that? She just pulled a Ji-Hyon. Amazing.