늦게 배운 도둑이 날 새는 줄 모른다
neutge baeun dodugi nal saeneun jul moreunda · A thief who learned late doesn't notice the dawn.
People who discover a hobby late in life get completely absorbed in it.
When to useYour parent who just discovered online games — or K-dramas.
Examples
아빠가 쉰 넘어 등산을 시작하시더니 주말마다 산에 가셔. 늦게 배운 도둑이 날 새는 줄 모른다니까.
Dad took up hiking past fifty and now he's on a mountain every weekend. The late thief misses the dawn.