someone's blood is up

(one's) blood is up

One is in an angry, aggressive, or violent mood; one is looking or ready for a fight. Everyone in the office knows to avoid the boss when her blood is up.
See also: blood, up
Farlex Dictionary of Idioms.

someone's blood is up

someone is in a fighting mood.
See also: blood, up
Farlex Partner Idioms Dictionary
See also:
  • give (one) (one's) head
  • give head
  • give somebody their head
  • give someone their head
  • drive (one) out of office
  • force (one) out of office
  • force out of office
  • cooking for one
  • 1FTR
  • as one door closes, another opens