go at each other tooth and nail

To fight, battle, or compete against each other with great ferocity, vigor, and intensity. The incumbent president and his opponent went at each other tooth and nail in the televised debate last night. The rioters and police have been going at each other tooth and nail all night long. A man jumped me in the dark alley, and, though we fought at each other tooth and nail, I managed to drive him away.

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References in periodicals archive

Plus, to see sports medicine cardiologists go at each other tooth and nail is just priceless." His good humor and genuine enthusiasm are never far away from one another.

Igniting passions one resident at a time

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