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English definition of “jump on sb”

jump on sb

verb uk phrasal verb with jump   /dʒʌmp/ us  
to criticize someone as soon as they have done something wrong or said something that you disagree with: She jumps on her children instantly if they're disobedient.Chastising and rebuking
(Definition of jump on sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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