Pedaling Prick
A Pedaling Prick is an insult aimed at cyclists. The word "Pedaling' comes from the fact that they have to 'Pedal' in order for the bicycle to move.
Trevor: You think you own the road don't ya, ya pedaling pricks! Stupid outfits and arcane technology don't make you better than me. This country was built by and for the motor car. Go to France with your bicycles!