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English definition of “open sb up”

open sb up

informal
verb uk phrasal verb with open   /ˈəʊ.pən/ us    /ˈoʊ-/
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 Learners Dictionary & Thesaurus © Cambridge University Press)
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