우물 안 개구리
umul an gaeguri · A frog inside a well.
Someone who knows only their own small world and thinks it's everything.
When to useEncouraging someone to travel or learn beyond their bubble — or teasing yourself for not having.
Examples
외국에서 일해 보니까 내가 우물 안 개구리였더라.
Working abroad, I realized I'd been a frog in a well.