the.com/slugfest

means A long, grinding contest—in boxing, baseball, or anything else—won by raw power and stamina rather than finesse.

from An American coinage blending 'slug' (to hit hard, from the noun meaning a heavy lump of metal, like a bullet or a chunk of ore) with '-fest' (a gathering or binge, as in 'songfest'). It landed in early 1900s sportswriting to describe baseball games that turned into home-run shootouts and boxing matches that became toe-to-toe brawls, then slugged its way into general use for any drawn-out, brute-force clash.