someone's blood is up
US /ˈsʌm.wʌnz blʌd ɪz ʌp/
UK /ˈsʌm.wʌnz blʌd ɪz ʌp/

1.
격분하다, 화가 머리끝까지 나다
someone is very angry or excited
:
•
When he heard the news, his blood was up and he started shouting.
그 소식을 듣자마자 그는 격분하여 소리치기 시작했다.
•
Don't say anything to him now, his blood is really up.
지금 그에게 아무 말도 하지 마, 그는 정말 화가 나 있어.