BRED IN THE BONE

{adj. phr.} Belonging to your nature or character, especially from early teaching or long habit; natural from belief or habit; believing deeply. * /The Willett children's cleanness is bred in the none./ Often used, with hyphens before the noun. * /Joe is a bred-in-the-bone horseman; he has been riding since he was six./ Contrast: SKIN-DEEP.