Definition
This idiom is used to express indifference, disdain, or anger towards what someone says or does, suggesting that their actions or opinions are of no consequence.
随他去吧！
If he thinks he should quit, then he can go hang himself!
如果他想辞职，那就让他去死吧！
She said she doesn't like my new haircut; she can go hang herself.
她说她不喜欢我的新发型；那就让她去死吧。
If he wants to waste his money on that stuff, then he can go hang himself.
如果他想把钱浪费在那东西上，那就让他去死吧。