teaser >> ˈtiːzə
Definition: [noun] a person who makes fun of or provokes others in a playful or unkind way.
Definition: [noun] a short introductory advertisement for a product that stimulates interest by remaining cryptic.
Example: promotional teasers in every commercial break
Definition: [noun] a tricky question or task.
Example: the teams get the chance to pose the opposition some teasers