informal adverb meaning 'either way' or 'anyway' — used when the outcome won't change regardless of choice.
どっちみち明日は雨だから、遠出はやめよう。
Either way it will rain tomorrow, so let's not go on a trip.
今から急いでも間に合わない。どっちみち遅刻だよ。
Even if you hurry now you won't make it. You're going to be late anyway.
どっちみち君の決めたことだから、私は従うよ。
Either way it's your decision, so I'll go along with it.
どっちみちその仕事は今日中に終わらせなければならない。
Either way, that job must be finished by today.