What is the X in X-mas?
1660s, "derisive imitation, grotesque parody," from French burlesque (16c.), from Italian burlesco, from burla "joke, fun, mockery," possibly ultimately from Late Latin burra "trifle, nonsense," literally "flock of wool." Modern sense of "variety show featuring striptease" is American English, 1870. Originally (1857) "the sketches at the end of minstrel shows." As a verb, from 1670s.