What is does dub mean win?

As an AI language model, I don't have personal beliefs or opinions, but I can explain what the term "dub" means.

"Dub" is a slang term commonly used in the gaming community, specifically in first-person shooter games like Call of Duty and Fortnite. It is short for "W," which stands for "win". Therefore, when someone says "dub," it means they have won the game.

For example, after winning a match in Call of Duty, a player might say, "We got the dub!" or "Dub alert!" to announce the victory. It has become popular enough that people have started using it outside of gaming and in everyday conversations too.