Free-for-all有两个意思。
第一个意思的英文释义为：a situation in which there are no rules or controls and everyone acts for their own advantage 。也就是不加管制、自由放任的意思。

第二个意思的英文释义为：a noisy fight or argument in which a lot of people take part。也就是混战、众人激烈争辩、大吵大闹的意思。