English version

something is somebody’s middle name

From Longman Dictionary of Contemporary Englishsomething is somebody’s middle namesomething is somebody’s middle nameinformalCHARACTER/PERSONALITY used to say that someone has a personal quality very strongly Don’t worry – discretion is my middle name. middle name
Examples from the Corpus
something is somebody’s middle nameDon't worry - consistency is my middle name.Optimism is my middle name because, unable to agree on a name, my parents stuck a pin in a dictionary.Let's just say this: Pretension is thy middle name.I think Serious is your middle name.
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