Definition of "Teaser" :

noun: a device for teasing wool

"A teaser is used to disentangle the fibers."

noun: a flat at each side of the stage to prevent the audience from seeing into the wings

noun: an attention-getting opening presented at the start of a television show

noun: a particularly baffling problem that is said to have a correct solution

noun: an advertisement that offers something free in order to arouse customers' interest

noun: someone given to teasing (as by mocking or stirring curiosity)

noun: a worker who teases wool