Out of the blue → 뜬금 없이, 갑자기

"Out of the blue" 는 뭔가가 예상치 못하게 갑자기 일어났을때 쓰는 표현이다.

Out of the blue (phrase) - without warning; unexpectedly.

비슷한 용어: suddenly, unexpectedly, without warning, unanticipated

The news came out of the blue. → 예상치 못한 뉴스가 떴어.

He started crying out of the blue. → 얘가 갑자기 울기 시작했어.

She called me out of the blue. → 나한테 뜬급없이 전화를 했어.

The Love Hypothesis, by Ali Hazelwood, ch. 4

"Then, out of the blue, he said, 'I talked with the department chair this morning.'"

Agnes at the End of the World, by Kelly McWilliams, ch. 47

"'Agnes.' Jazz spoke out of the blue."

It Ends With Us, by Colleen Hoover, ch. 7

"... you show up again out of the blue! You show up at my work, you show up at my apartment door, you show up at parties, you..."