Andretti - a racing-style left turn made by motorists on surface streets ... particularly in residential areas.
Instead of making a squared-off turn - more like a right angle - the motorist takes a flatter line and briefly sweeps through the opposing lane of the cross street.
Super Andretti - an even deeper, flatter andretti: where the motorist almost clips the curb with his driver's side tire - thus saving something like .15 seconds when the "super" is compared to a safer, more conservative turn.
A classic Urban Rider response to the andretti is to loudly call out "ANDRETTI!": giving the motorist the impression that someone is swearing at him in Italian.
Another classic Rider response to a motorist cutting a corner, and missing by inches: "OLE!"