상대방이 너무나 당연한 소리를 하거나 어리석은 실수를 했을 때 비꼬는 의미로 사용하는 말.
Used to mock someone for saying something obvious or for making a foolish mistake.
예문:
""The meeting is at ten." "Duh, I'm the one who scheduled it.""
""I forgot to turn on the oven." "Duh! No wonder the cake is still raw.""