Instead of using afk (away from keyboard) which is commonly used in gaming lingo, afs (away from screen) would make be more revelant for all means of playing video games whether that be on console or pc.
Meaning “Away From Switch.” It’s used to indicate that someone is temporarily stepping away from their Nintendo Switch console. It’s the Switch equivalent of saying “AFK” (Away From Keyboard), but specifically tailored to the Nintendo ecosystem.
Bro's stomach wasn't good during his SSBU match so he had to go AFS to take a potty.