do someone in phrasal verb, verb - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “do someone in”

do someone in

infml
phrasal verb with do  us   /du/ verb (present tense does  /dʌz, dəz/ , past tense did  /dɪd/ , past participle done  /dʌn/ )

(CAUSE TO FAIL)

to be the cause of someone's failure: A couple of key losses did the team in.
(Definition of do someone in phrasal verb, verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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