“That’s all right! Nobody became aware of my mistake.”
This word mocks someone who makes mistake and then try to hide that by unskilled way.
This word is not used by someone who makes mistakes, is used by observers.
you can say this word when you see situation like a below motion picture.
Definition by other languages
실수를 저지른 사람이 태연하게 그 실수를 감추는 행동을 하는 경우, 그 어색함을 제3자가 조롱하는 단어이다.
괜찮아 자연스러웠어.(this word usually uses alone)