Meaning of “be in the/sb's blood” in the English Dictionary

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"be in the/sb's blood" in British English

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be in the/sb's blood

If an ability or skill is in someone's blood, they have it naturally, usually because it already exists in their family:

His father and grandmother were painters too, so it's obviously in the blood.

(Definition of “be in the/sb's blood” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)