"Off-camber" is used to describe a
corner whose
bank slopes toward the outside of the corner rather than the inside. You know those
oval tracks where the course is shaped like a bowl, so the
centripetal acceleration helps stick the
vehicles to the road surface.
Well, an off-camber corner is the opposite of that - the slope worsens the traction situation, rather than making it better. So off-camber corners are scary.