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English definition of “be sb's middle name”

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be sb's middle name

informal
to be a quality that is an important part of someone's character: Don't worry, I won't tell anyone. Discretion is my middle name.
Translations of “be sb's middle name”
in Chinese (Traditional) 是(某人的)突出個性…
in Chinese (Simplified) 是(某人的)突出个性…
(Definition of be sb's middle name from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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