cool one's heels

cool one's heels  {v. phr.},  {slang}
To be kept waiting by another's pride or rudeness; be forced to wait by someone in power or authority; wait.
He cooled his heels for an hour in another room before the great man would see him.
I was left to cool my heels outside while the others went into the office.
Categories: {slang} {v. phr.}