road toad 

The driver who insists upon constant lane-changing during heavy traffic in a useless effort to gain position in traffic. Often ends up wedged under a semi.

The road toad trying to get ahead of us is now plastered to the side of a Swift truck.

road toad by ezemofo February 4, 2010

road toad 

A cyclist who takes up space on the road and doesn't let any vehicles pass even when there's perfectly available space to the side of the road.

Sorry I'm late mate a fucking road toad was in the way!

road toad by antiraodtoad March 5, 2017