5. Noona

What non-K-Pop fans think:

The Korean word used by younger males to address older females.

In K-Pop context:

The right for fangirls to gush over how adorable their idols are when the artistes address them as 'noona'.

The 'Noona' market, which characteristically is one that has a bigger spending power than regular fangirls, was what boy group SHINee was marketed for when they made their debut. The group became an instant hit with the older fan-girls with the song 'Noona, You're so Pretty'.