to the death
Until one participant is killed. In this part of town, ever fight you get into could end up being to the death, so you'd be wise to watch your step. The encounter will be a battle to the death between the two animals.
to the ˈdeath
until somebody dies or is defeated: There was a fight to the death between two men armed with knives. to the death
Until one participant in a fight or struggle has died or been killed.