From Longman Dictionary of Contemporary Englishbe/run in somebody’s bloodbe/run in somebody’s bloodFAMILYif an ability or tendency is in, or runs in, someone’s blood, it is natural to them and others in their family → blood
Examples from the Corpus
be/run in somebody’s blood• It seemed to be in his blood.• It would be in his blood in minutes.• Psychic awareness ran in my blood. 