멘붕
menbung
A mental breakdown — total panic or confusion.
OriginShort for 멘탈 붕괴 (mental collapse).
When to useWhen everything goes wrong at once.
CarefulCasual — fine with friends, out of place in formal writing or with your boss.
Examples
파일이 다 날아가서 멘붕 왔어.
All my files disappeared and I totally panicked.