in the/somebody's blood/genes

in the blood

Innate, as of a skill or quality. That type of passion can't be taught—it's in the blood.
See also: blood
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

in the blood

 and in one's blood
Fig. built into one's personality or character. John's a great runner. It's in his blood. The whole family is very athletic. It's in the blood.
See also: blood
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

in the/somebody’s ˈblood/ˈgenes

part of somebody’s nature and shared by other members of their family: Both his father and his mother were writers, so literature runs in his blood.
See also: blood, gene
Farlex Partner Idioms Dictionary © Farlex 2017
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