- 1拚死一搏的；成敗在此一舉的
If something is do-or-die, you feel you must succeed, because failing would be the end. It is the last chance. Sports writers love it for a final match; people at work use it when a project must work or everything falls apart. It almost always sits in front of a noun: a do-or-die effort, a do-or-die attitude, a do-or-die moment. It sounds big on purpose. You are not calmly hoping. You are pushing as if your life depends on it — though actually, most of the time nobody will die. The phrase just means the stakes feel that high. It is informal, a little like a film, and too heavy for small everyday choices.
「do-or-die」形容一件事非成功不可，失敗就等於結束，是最後的機會。體育記者常用來形容決賽，上班族也會在專案一定要成功的時候用。這個字幾乎都放在名詞前，形式是「a do-or-die + 名詞」，例如「a do-or-die effort」（拚死一搏的努力）。
說法刻意講得很重，像是拚到性命攸關，不過多半不會真的有人送命。它的語氣偏口語，帶一點戲劇感，所以只適合用在真正關鍵的時刻，不適合拿來形容日常的小決定。
From the word’s history
An adjectival phrase of do, or and die joined by hyphens.
由 do、or、die 三個字用連字號連起來。
組成The words do, or, and die joined by hyphens.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
do-or-dieadj
- 1
Requiring a determined or desperate effort in order to avoid the consequences of failure.
- At that period the L.N.W.R., with its Webb compounds, was addicted to late arrivals at Carlisle and the Caledonian proceeded to make up the arrears with a "do-or-die" attitude.
- The do-or-die mentality gambaru permeates Japanese society, where the pursuit of a goal can carry more significance than the outcome.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。