look up any word, like the eiffel tower:
A professional joker employed by a royal personage, typically performing acts both comedic and sexual in nature.

ORIGIN Old English, of Germanic origin.
The coital jester's jaunty jig did delight the king to no end. "You have brought me joy, fool," he did say, "Come sit upon my cock!"
by Lil' Shammie August 28, 2013