대기만성이 · 대기만성을 (often 대기만성형)
late bloomer; great talents mature late
Example
그 배우는 마흔이 넘어서 유명해진 대기만성형이에요.
That actor is a late bloomer who became famous after forty.
Word parts
대 big+기 vessel+만 late+성 complete
Literally 'a big vessel is completed late'.
Related words