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English definition of “open sb up”

open sb up

informal phrasal verb with open     /ˈəʊ.pən/ US  /ˈoʊ-/ verb
to do a medical operation on someone to see inside their body: When they opened her up, they couldn't find anything wrong with her.Unfastening and openingSurgery
(Definition of open sb up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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