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English definition of “shake someone up”

shake someone up

verb phrasal verb with shake  /ʃeɪk/ (past tense shook  /ʃʊk/, past participle shaken  /ˈʃeɪ·kən/) us  

(UPSET)

to upset someone: It really shook Gerry up when his best friend moved away.
(Definition of shake someone up from the Cambridge Academic Content Dictionary © Cambridge University Press)
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