When someone makes a smurf (Secondary Account) to win games in any Online PvP Videogame (e.g. League of Legends, Apex Legends etc.) to have easier games or to win more games, but isn't actually much better than the elo of their main account.
Person 1: "That account has a 60% winrate."
Person 2: "Don't worry, they're propably just a gold smurf. Their winrate isn't even that high!"