Wiktionary
have the last laugh
alt. (context idiomatic English) To be vindicated; to triumph despite predicted failure; to find success after defeat or setback. vb. (context idiomatic English) To be vindicated; to triumph despite predicted failure; to find success after defeat or setback.
Usage examples of "have the last laugh".
Hiding away in exile, with the Federation Council making pronouncements against him and his friends, and now they were going to have the last laugh.
What the runaways didn't know was that AMEXICO would have the last laugh.
No matter how smart the King might be, the gods would always have the last laugh.
Brumhest's blackening of her name, but she reminded herself that she would have the last laugh in the end.