What is Kahyun?
Ka for short. A small gnome-like asian, who states she will never have sex before marriage, but secretly is a transexual whore at night. She often doesn't remember, but some days wakes up with STD's that she does not recall ever having. Most Kas are from Korea, but can differ from ka to ka. At night she is the sex goddess for all the undesirable men in the world, such as hairy fat men who are easily three times her size.
Friend: "Ka, what did you do last night?"
Kahyun: "I don't remember, but i woke up this morning with a pain in my crotch."