The angry customer is out for blood after the mistake.
out for blood
idiomWith the intent of killing or severely injuring somebody (especially out of revenge).
After the company fired him without warning, he was clearly out for blood and threatened to sue everyone involved.
The rival politician entered the debate looking out for blood, determined to destroy his opponent's reputation with every word.
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blood and guts
Gore; gruesome images.
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blood in the water
In a competitive situation, the exhibition of apparent weakness or vulnerability by one party, especially when this leads to a feeling of vulnerability or greater pressure to perform on the part of the weak party, or enhanced expectation of victory by the others.
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blood is thicker than water
Family relations and loyalties are stronger than relationships with people who are not family members.
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blood, sweat and tears
A person's determination and hard work.
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get blood out of a stone
To do something difficult, frustrating, or pointless.
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have blood on one's hands
To be responsible for a violent act.
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have someone's blood on one's head
To be responsible for someone's death, pain, or misfortune.
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make someone's blood boil
To cause a person to feel angry or very annoyed, especially in situation in which one cannot fully display that feeling to others.
Last updated April 17, 2026