Clutch Chuck

Downshifting to 1st or 2nd gear from 5th (or a higher gear) to quickly slow down your vehicle when someone is driving too close behind you.

Clutch chucking is like "brake checking" except there are no break lights and the person behind you will have little-to-no warning that you have slowed down.

Nick: Man, this guy is driving right on my ass!

Elric: Just clutch chuck him, he'll back right off.