겹치기 /gyeop-chi-gi/
Overlap / Schedule conflict
Literally 'overlapping.' In K-pop fan culture, it refers to comebacks, fan events, or releases clashing at the same time. Also used generally for any schedule conflict.
Examples
좋아하는 가수 컴백이 겹치기네
My favorite artists are having comeback overlaps
겹치기라서 어디 가야 할지 모르겠어
There's a schedule conflict so I don't know where to go