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

1.
darah mendidih, sangat marah
someone is very angry or excited
:
•
When he heard the news, his blood was up and he started shouting.
Ketika dia mendengar berita itu, darahnya mendidih dan dia mulai berteriak.
•
Don't say anything to him now, his blood is really up.
Jangan katakan apa pun padanya sekarang, darahnya benar-benar mendidih.