What is a hack line?

A hack line typically refers to a catchy, often simplistic phrase or slogan used in advertising, marketing, or creative writing to grab attention and convey a message quickly. It can also denote a clever or witty remark that resonates with an audience. In the context of screenwriting, a hack line might describe a cliché or overused trope. Overall, it serves as a memorable hook that encapsulates the essence of a concept or idea.