run in the blood

run in the blood

To be innate, as of a skill or quality. All of my relatives are doctors—medical prowess just runs in the blood. That type of passion can't be taught—it has to run in the blood.
See also: blood, run

run in the blood

Also, run in the family. Be characteristic of a family or passed on from one generation to the next, as in That happy-go-lucky trait runs in the blood, or Big ears run in the family. The first term dates from the early 1600s, the second from the late 1700s.
See also: blood, run