leadfoot

Noun

 * 1) One who drives quickly or without subtlety, one who often engages in and/or is fond of slamming and flooring the accelerator often.
 * The leadfoot screeched to a stop inches from the tree.
 * 1) A driver who does not compensate the throttle position of the vehicle for road conditions or terrain, invariably slowing down while going uphill and speeding up while going downhill.
 * Out of the way, leadfoot!