Usually they're called `Lance wannabees', and the term is applied any time somebody wearing lycra on a nice road bike is somehow inconveniencing or in some other way bothering somebody in a car.

It doesn't really have much to do with skill or speed ... if you're in lycra, on a road bike, and you're not Lance -- you're a Lance wannabee. These same people also hate the fixed gear crowd, and they're all hipsters, no matter what they're wearing or how their bike is set up. Really, they usually hate anybody on a bike, but those are the groups they seem to stereotype the most.