藪やぶから棒ぼう

expression, noun

out of the blue; bolt from the blue; complete surprise

Idiomatic expression for something sudden and unexpected, often used when someone says or does something abruptly without context.

• 彼かれは藪やぶから棒ぼうに「結けっ婚こんしよう」と言いった。

  Out of the blue, he said, "Let's get married."

• 藪やぶから棒ぼうな質しつ問もんで驚おどろいた。

  I was surprised by the sudden, unexpected question.