teaser

(noun) a worker who teases wool.

(noun) someone given to teasing (as by mocking or stirring curiosity). Synonyms: tease, annoyer, vexer.

(noun) an advertisement that offers something free in order to arouse customers' interest.

(noun) a particularly baffling problem that is said to have a correct solution. Synonyms: puzzle, puzzler, mystifier. Examples: "He loved to solve chessmate puzzles." "That's a real puzzler."

(noun) an attention-getting opening presented at the start of a television show.

(noun) a flat at each side of the stage to prevent the audience from seeing into the wings. Synonyms: tormenter, tormentor.

(noun) a device for teasing wool. Examples: "A teaser is used to disentangle the fibers."