knock-down-and-drag-out

CIDE DICTIONARY

knock-down-and-drag-out, 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.  [WordNet 1.5]

THESAURUS

knock-down-and-drag-out

affray, altercation, barney, bickering, boisterous, brawl, broil, dispute, donnybrook, donnybrook fair, dustup, fight, fracas, fray, free-for-all, harum-scarum, hassle, knockabout, melee, rambunctious, rampageous, rhubarb, riot, roisterous, rollicking, rough, rough-and-tumble, row, rowdy, ruckus, ruction, rumpus, run-in, scrap, scrimmage, set-to, shindy, wild