The name given to a person who takes a scooter to a skate park. In the same context that fruit booter and wood pusher are used to describe skaters and skateboarders, respectively, calling someone scooter curious suggests the possibility of that person having homosexual tendencies.
Steve: "Hey man why didn't you go to the game with us last night?"
Mark: "I was watching Twilight with a group of my friends."
Steve: "When the hell did you go scooter curious on us?"