올팬 (olpaen)

What 올팬 means
A fan of every member.
When Koreans use it
Say you support all members of a group rather than focusing on only one.
A short conversation
Korean
A: 누구 팬이야?
B: 멤버 다 좋아하는 올팬이야.
English
A: Whose fan are you?
B: I love all the members.
Use it with care
Combines all and 팬. Does not imply knowing every detail about every member.
From Korean Your Teacher Doesn’t Teach You by Injin Hwang. The meaning, usage, dialogue, and notes above follow the author’s book.