cool one's heels
Meanings of "cool one's heels"
to be forced to wait by someone in power or authority
Wait a long time at the same place
to wait; connotes some degree of annoyance and would usually be used in informal situations
Example: The assistant had a 3 o’clock appointment with his boss but the boss kept him cooling his heels in the outer office until well past 4:30.
είμαι αναγκασμένος να περιμένω