noun
a violent and intense fight or argument
adjective
characterized by or involving violent and intense conflict
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The two lawyers engaged in a knock-down-and-drag-out legal battle in the courtroom.
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The siblings always have knock-down-and-drag-out fights over who gets to use the TV remote.
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I heard there was a knock-down-and-drag-out brawl at the bar last night.
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The CEO and the union leader had a knock-down-and-drag-out negotiation before reaching a compromise.