bad blood

noun

unfriendly or hostile relations; enmity; hostility; animosity: When the territory was being settled there was bad blood between the farmers and the ranchers.

Origin:
1815–25

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary

bad blood

—n
	a feeling of intense hatred or hostility; enmity

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Bad blood is always a great word to know.

So is callithumpian. Does it mean:

a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.

a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.

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American Heritage

Idioms & Phrases

bad blood

Anger or hostility between persons or groups, as in There's been bad blood between the two families for years. This term is based on the old association with blood and emotion, particularly anger. Versions such as ill blood preceded it; Charles Lamb was among the first to use the idiom in its current form in an 1823 essay.

Matching Quote

"I don't like your miserable lonely single "front name." It is so limited, so meagre; it has no versatility; it is weighted down with the sense of responsibility; it is worn threadbare with much use; it is as bad as having only one jacket and one hat; it is like having only one relation, one blood relation, in the world. Never set a child afloat on the flat sea of life with only one sail to catch the wind."

-D.H. Lawrence

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