"jokes on you" یعنی چی؟

خیط شدی/ کور خوندی/ ضایع شدی /عن شدی و …

If you say that the joke is on a particular person, you mean that that person has tried to make someone else look silly but has made himself or herself look silly instead.

He thought he could embarrass us, but now the joke is on him and he's the one who looks foolish.