knock sb back (sth) Meaning in Cambridge English Dictionary
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Meaning of "knock sb back (sth)" - English Dictionary

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knock sb back (sth)

UK informal
phrasal verb with knock uk   /nɒk/  us   /nɑːk/ verb
to cost someone a large amount of money: I bet that computer knocked you back several hundred.
Translations of “knock sb back (sth)”
in Chinese (Traditional) 讓(某人)花費(一大筆錢)…
in Chinese (Simplified) 让(某人)花费(一大笔钱)…
(Definition of knock sb back (sth) from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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