Jester n. : A buffoon; a merry-andrew; a court fool.

Jester n. : A person addicted to jesting, or to indulgence in light and amusing talk.

Example:
How do I make a Jester costume for halloween?

Taxonomy
jester, fool, court jester, The Court Jester, buffoon, the Fool, tradition, the Jester, court, character, Death, free encyclopedia, monarch, symbol, clowns, the jesters, Around the World, Jokester.

Defination from the web:
jester by William Merritt Chase. A jester, joker, jokester, fool, wit-cracker, prankster or buffoon was a person employed to tell jokes and provide general entertainment, typically by a European monarch. ... 19th century engraving of Will Somers, Henry VIII's jester. ...