blood is up
idiom
British
—used to say that someone is angry and wants to fight or argue
It's best to avoid her when her blood is up.
Dictionary Entries Near blood is up
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“Blood is up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood%20is%20up. Accessed 21 Nov. 2024.
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