A pill that is used to ease eye strains after long hours of sitting in front of the computer screen. Imported illegally from South Korea, it is popular with lifeless gamers, koreanophiles and kids who have occasional sight troubles.
Warning: side effects include hyperthermia, hallucination, dizzyness, stress, cardiac arrest and/or strains in male genitalia (females can be affected too, between their labia majora and labia minora.)
Guy 1: Ow! My dick hurts!
Guy 2: What happened?
Guy 1: I had two pills of Flyff last night to ease my eye strains, but all it did was killing my genitalia. Now I won't able to have sex with my girl tonight!
Guy 2: That sucks!
Aigo, aigo, aigo!