A syndrome that causes a middle age man to believe he is back in highschool or college when he was having his glory days in a particular sport. The sport is usually baseball. Someone with this syndrome will most likely be found being the assistant coach for a highschool baseball team, wearing the full uniform, looking like one of the players only 30-40 years older. They can't seem to grasp the fact that they're never going to play again and have to get as close to the action as they can.
Fred: "Why's that old man wearing the full uniform?"
Tom: "Is he playing?"
Fred: "Oh god, I know what's going on here. That guys not playing he just has glory day syndrome