curve killer

That one person in class who scores significantly higher on a test than the rest of his peers resulting in the grade boost/curve being rendered useless. Curves often give the highest grade an A but if the person has close to an A there is either a very small curve or no curve at all despite everyone else's grade.

James: Mr. Johnson said that he was gonna curve the grade on that test! I only have a 33. What did you get Morgan?
Morgan: I got a 92
James: Aww! You freakin curve killer.