Question

Cool Your Heels to be kept waiting for a long time, usually by someone in power or authority

Accepted Answer

Poor Jerry. I just saw him cooling his heels outside the principal's office. Your feet become warm or hot when you run or walk. But when you are forced to sit for a long time or stand in one place, the heels of your feet stay cool. That's why, since the early 1600s, the saying is that when someone keeps you waiting, you're "cooling your heels."

Idiom	Cool Your Heels
Example	Poor Jerry. I just saw him cooling his heels outside the principal's office.
Meaning	to be kept waiting for a long time, usually by someone in power or authority
Origin	Your feet become warm or hot when you run or walk. But when you are forced to sit for a long time or stand in one place, the heels of your feet stay cool. That's why, since the early 1600s, the saying is that when someone keeps you waiting, you're "cooling your heels."

Heels Long Feet Cool Poor Jerry I Cooling