오열 /o-yeol/
Sobbing / Ugly crying
Literally means 'wailing'. Used both literally (actually crying intensely) and hyperbolically online (content so emotional it figuratively made you sob).
Examples
이 영화 보다가 오열했어
I was sobbing while watching this movie
이 장면 진짜 오열 ㅠㅠ
This scene genuinely made me ugly cry