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English definition of “blood brother”

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blood brother

noun [C] uk   us  
a man who has promised to treat another man as his brother in a ceremony in which they cut themselves and mix their blood together
Translations of “blood brother”
in Chinese (Traditional) 結義兄弟…
in Chinese (Simplified) 结义兄弟…
(Definition of blood brother from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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