Meaning of “throw (sb) a curve (ball)” in the English Dictionary

british dictionary

"throw (sb) a curve (ball)" in British English

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throw (sb) a curve (ball)

mainly US and Australian English informal

to surprise someone with something that is difficult or unpleasant to deal with:

(Definition of “throw (sb) a curve (ball)” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)