its the girlfriend that doesnt let her boyfriend out of her sight, makes his decisions, and has his balls in a jar above her desk, thus she's driving HIS bus
Man remember when dustin could come hang out whenever he wanted? his girlfriend is a real bus driver!
One who, whilst playing video games and in particular, driving games (NFS, Gran Turismo, Forza), unintentionally turns the game controller to imitate the corner they are attempting to take and in the process looking like they are driving a bus.
"Dude! You are such a bus driver! Let me do the race."