短语 “the joke is on you” 用来描述 “本想通过开别人的玩笑，让别人看起来很傻，但反倒让开玩笑的人自己看起来很可笑”。我们也可以用 “the joke has backfired（这个玩笑适得其反）” 来表示同样的含义。

例句
You tried to make me drink that cup of salted coffee, but I didn’t, so the joke is on you!
你想让我喝那杯加了盐的咖啡，但我没喝。玩笑这回开到你头上了吧！

By forcing me to present the project to the boss, I got a pay rise, so the joke is on you!
你逼我去给老板递交这个项目，我因此得到了加薪，现在你傻眼了吧！

By forcing us to attend the meeting, I now can’t finish my tasks, so you’ll have to do them. Looks like the joke is on you!
你非让我们去参加会议，现在我手头的工作完成不了，只得你去做。这回玩笑开到自己头上了吧！