A Gunsgaming is someone skilled at First-Person Shooter (FPS) Games. He also has a YouTube channel that has a ton of subscribers.
Origin of word: "Gun" comes from the Chinese word 滚, which means roll. In this context, it means to defeat all competitors and emerge top. Note: "Guns" here is pronounced Ger-Wun-sssss
Keith: Hey Barry, did you hear about the guy who is damn pro at FPS games and has 60K subscribers on YouTube?
Barry: Yes he is a Gunsgaming.