WWJD is an initialism for the phrase, What would Jesus do?

In the mid- to late-1990's, the phrase had achieved immense popularity in the United States and had become the personal motto of thousands of people, including a large number of non-Christians. Bracelets with WWJD are popular with some Christian teens. Other paraphernalia with WWJD inscribed are available as well. The purpose of the phrase is to remind people to act in a manner that Jesus would approve of.