kick one’s heels —(coll.) have nothing to do, especially while being kept waiting (also: cool one’s heels):
- I had to kick my heels for nearly two hours before I could see the boss.
kick up one’s heels —(coll.) cast off one’s inhibitions and have a good time:
- I took two weeks for my holidays and had a pleasant time kicking up my heels around the beaches of Majorca.