흑역사 /heuk-yeok-sa/
Dark history / Cringe past
Literally 'black history'. Refers to an embarrassing past moment, phase, or memory you wish you could erase — your cringe era.
Examples
중학교 때 사진이 나의 흑역사야
My middle school photos are my dark history
그 영상 진짜 흑역사야 ㅠㅠ
That video is genuinely my cringe era