The Collaborative International Dictionary
knockdown-dragout
knock-down-and-drag-out \knock-down-and-drag-out\, knockdown-dragout \knockdown-dragout\adj. marked by extreme violence; -- of fights; also used metaphorically of fierce contests; as, a knock-down-and-drag-out fight; a knockdown-dragout competition for the browser market.
Syn: ferocious, fierce, knockdown-dragout, tearing.
Wiktionary
knockdown-dragout
a. (context of a fight or battle English) Markedly violent. alt. (context of a fight or battle English) Markedly violent.
WordNet
knockdown-dragout
adj. extremely violent; "a knock-down-and-drag-out fight" [syn: knock-down-and-drag-out]