be after/out for somebody's blood

be after (one's) blood

To seek revenge on another person. He hit my car, so I'm after his blood now.
See also: after, blood
Farlex Dictionary of Idioms.

be after/out for somebody’s ˈblood

(informal, often humorous) want to hurt or harm somebody, especially as revenge: They have been after my blood ever since I accidentally damaged their car.
See also: after, blood, out
Farlex Partner Idioms Dictionary
See also:
  • be after (one's) blood
  • after (one's) blood
  • after your blood
  • in the blood
  • in the/somebody's blood/genes
  • be in (one's) blood
  • cold blood
  • bleed out
  • in one’s blood
  • in your blood