Curve Buster Share definition Flag Someone who gets a high grade on a test when everyone else fails, therefore making the grading curve an impossibility. Shane's such a curve buster, he got an A on the midterm when half the class got C's. Curve Buster by Lady Alzers September 5, 2010 0 0 Get merch Get the Curve Buster mug. Buy Now — $32.95 See more merch