Front body roll is when you dive the car hard into a tight corner and the body leans badly to the outside. You can't get the maximum tire contact if you have this problem. The car is rolling most of the car's weight to the outside tires and is trying to lift the inside tires. Not an optimum condition for going fast.....Anti-roll bars (sway bars) and shocks and springs can be used to correct this problem. The Crossfire has very little body roll right out of the box.

I won't try to expand on what John Webster said about Over/Under steer (push/loose). He explained it very well.