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

1.
怒火中燒, 非常生氣
someone is very angry or excited
:
•
When he heard the news, his blood was up and he started shouting.
當他聽到這個消息時,他怒火中燒,開始大喊大叫。
•
Don't say anything to him now, his blood is really up.
現在別跟他說什麼,他真的怒火中燒。