올클 (olkeul)

What 올클 means
Getting every course you wanted.
When Koreans use it
Celebrate successfully registering for all the classes on your planned timetable.
A short conversation
Korean
A: 수강 신청 어땠어?
B: 이번엔 올클했어!
English
A: How did course registration go?
B: I got all my classes!
Use it with care
From all clear. It means successful registration here, not passing all the exams.
From Korean Your Teacher Doesn’t Teach You by Injin Hwang. The meaning, usage, dialogue, and notes above follow the author’s book.