lead foot
/ˈled ˌfo͝ot
/noun [in singular] informal
A tendency to drive fast: she drives with a lead foot...
- I did lose my driver's license in college because of a lead foot.
- They say I've a lead foot… and my truck only goes to 90…
- Drag racing may look easy, but he contradicts the notion that the straight-line sport requires little more than a lead foot and a strong constitution.