A mathmatical graph originated by the ancient greeks some two thousand years ago and still inflicted upon unsuspecting high school students today. Vastly inferior to the hyperbola, of course.
Math geek: I'm not merely eccentric, I'm a parabola!
Math teacher: now, class, graph this equation on your TI-83 calculators and tell me what kind of parabola it is.
The cooliest most awsome graphed equation in math. Everyone knows it has one squared term and a postive one forms a happy face and negitive one forms a sad face.