Oppa and unnie meaning in K-pop
오빠 · 언니 · say “OH-pah, UN-nee”
Oppa is what a girl or woman calls an older man, and unnie is what she calls an older woman.
What does Oppa and unnie mean?
These are everyday Korean words for an older brother or sister, also used for close older friends. Fans borrow them for idols who are older than them.
Men use different words: hyung for an older man and noona for an older woman. In boy groups you will hear members call each other hyung all the time.
Example
"The members call their leader hyung."