be in someone's blood
US /bi ɪn ˈsʌm.wʌnz blʌd/
UK /bi ɪn ˈsʌm.wʌnz blʌd/

1.
jemandem im Blut liegen, angeboren sein
if an ability or quality is in someone's blood, they have it naturally, often because other members of their family also have it
:
•
Music really seems to be in his blood; his whole family are musicians.
Musik scheint ihm wirklich im Blut zu liegen; seine ganze Familie sind Musiker.
•
She's a natural leader; it must be in her blood.
Sie ist eine geborene Anführerin; es muss in ihrem Blut liegen.