be after someone's blood
US /bi ˈæftər ˈsʌmˌwʌnz blʌd/
UK /bi ˈæftər ˈsʌmˌwʌnz blʌd/

1.
想找某人算账, 对某人非常生气
to be very angry with someone and want to punish them
:
•
After he crashed her car, she was really after his blood.
他撞坏她的车后,她真的想找他算账。
•
The boss will be after your blood if you don't finish this report on time.
如果你不按时完成这份报告,老板会找你算账的。