다 된 죽에 코 풀기
속담
literallyblow one's nose on the juk, rice porridge, that was almost cooked
To spoil something almost completed by an absurd or ill-timed mistake.
뜻풀이In Korean
거의 다 된 일을 어이없이 망쳐 버리는 것.
Also means
- For one to disturb something almost completed by someone else in a very wrongful way.