A fork of Rural Dictionary
A person who spends an un-healthy amount of time playing a beta (trial) version of a game, usually with the hopes it will make them cool/interesting.
Guy 1: Hey how's the Gears of War Beta? Guy 2: Awesome! I'm already ranked 54 in the world for deathmatches! Guy1: Fucking Masterbeta. Person: You hear the Phantasy Star beta got shut down? Other Person: I know! It's terrible! I would play that shit all the time with my friends! We kicked the D-Ragon's ass all the time! Person: You guys are fucking Masterbeta's.