What is the X in X-mas?
(French: "rhymed ends"), rhymed words or syllables to which verses are written, best known from a literary game of making verses from a list of rhyming words supplied by another person. The game, which requires that the rhymes follow a given order and that the result make a modicum of sense, is said to have been invented by the minor French poet Dulot in the early 17th century. Its wide popularity inspired at least one notable tour de force, an extended satirical poem by the French poet Jean-Francois Sarasin, entitled Dulot vaincu (1654; "Dulot Defeated"). The fad was revived in the 19th century when Alexandre Dumas pere invited French poets and versifiers to try their skill with given sets of rhymes and published the results in 1865.