- 措手不及 [cuò shǒu bù jí]
- （事情来得太快，出乎意外，来不及应付） be taken by surprise; be caught unawares [unprepared]; be too late to do anything about it; be too surprised to defend oneself; could make no adequate defense; could not think in time of a way to defend oneself; have no time to put in one's hands; spring a surprise on sb.; throw sb. off his guard:
Our enemies were caught unprepared and we disposed of them without firing a single shot. 我们打了它个措手不及，一枪没放就把他们收拾掉了。
The guests came an hour early. That caught you on the wrong foot!
He caught me on the wrong foot--I left all my money at home.
You've caught me on the hop, I'm afraid give me five minutes to get ready.