눈코 뜰 새 없어요 · 눈코 뜰 새 없었어요 · 눈코 뜰 새 없이 바쁘다
to be extremely busy, to have no time to breathe
Example
이번 주는 일이 많아서 눈코 뜰 새 없이 바빴어요.
I had so much work this week that I was crazy busy.
Word parts
Literally 'no time to even open your eyes and nose'.
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