I didn't have to cool my heels in a classroom.
I was left to cool my heels for a little.
Let him cool his heels here with us a while.
He had to cool his heels for a couple of hours.
People were not going to like cooling their heels for two hours.
"You've made the Council cool their heels for nearly half an hour already."
We'll just have to cool our heels for a while.
He would just cool his heels here for a while, then find out what the problem was.
Everybody just cool your heels while I figure out what's going on!
The two men he really wanted to talk to and get down to business with were still cooling their heels outside.