Korean phrase
~ 는 이유가 안 돼요. ~ neun i yu ga an twae yo
Meaning
___ is no excuse
When to use it
This says that a stated reason is not accepted as valid. It is a firm response when someone gives a reason for a problem.
Example dialogue
전화 못 받아서 미안해요, 차가 막혔어요. cheon hwa mot pa da seo mi an hae yo cha ga ma kyeo sseo yo
Sorry I couldn't answer the phone; there was a traffic jam.
교통 체증은 이유가 안 돼요. kyo tong che jeung eun i yu ga an twae yo
A traffic jam is no excuse.