spring something on someone
phrasal verb with spring verb [ I usually + adv/prep ] uk/sprɪŋ/ us/sprɪŋ/ sprang or sprung | sprung
突然告诉（某人）；冷不防地问（某人）
to suddenly tell or ask someone something when they do not expect it
I hope he's not going to spring any nasty surprises on us at the meeting this morning. 我希望今天上午的会议他不会冷不防对我们说出一些让人讨厌的话来。