the final word
1. The final point in an argument or discussion, especially that which decisively or conclusively ends it. The whole meeting just descended into chaos as everyone tried to have the final word. David is so smug and always has to have the final word in every debate.
2. The authority to decide how something ultimately happens or is done. As the editor-in-chief, I have the final word on the layout design for every issue.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.