Wiktionary
n. A person in colorful garb and fool's cap who amused a medieval and early modern royal or noble court.
Usage examples of "court jester".
At his right elbow, as was not unusual, crouched the court jester, Odclay.
It might as easily have been a demon or a court jester, and he wondered whether he ought to smile or cross himself.
There were pieces of indecipherable Kzinti equipment, and there was a medkit from the emergency doc in the Court Jester.
In contrast, the flat Court Jester had been designed for landing ability alone.
Taking the set of protagonists mentioned in the previous paragraph, let's see how they could be made richer with the addition of these deeper character problems: the Court Jester wants to go on the Great Quest to help his king, but he has always been a coward and shies from dangerous circumstances.
Thirty inmates lounged in various stages of repose in plastic cafeteria chairs, some looking at the court jester, some chatting away as if he didn't exist.
Perchance I owe my God and the world another pie of folly, and I have now made up my mind honestly to pay that debt, if I can do so, and for once to become court jester.