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English definition of “spring sth on sb”

spring sth on sb

verb [I usually + adv/prep] uk phrasal verb with spring   /sprɪŋ/ (sprang or US also sprung, sprung) us  
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.
(Definition of spring sth on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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