be after (one's) blood

To seek revenge on another person. He hit my classic car, so I'm after his blood now.

Name	Pronounced	Usage
Helmo	-	Ancient Germanic
Jehoshaphat	ji-HAHSH-ə-fat (English), jee-HAHSH-ə-fat (English)	Biblical
Rikhard	REEK-hahrd	Finnish
Sepi	SE-pee	Finnish
Fabian	FAH-bee-ahn (German, Dutch), FAH-byahn (Polish), FAY-bee-ən (English)	German, Dutch, Polish, History
Gwenevere	GWEN-ə-vir	English (Rare)