What would Jesus do?
WWJD is an initialism for the phrase What would Jesus do? In the mid to late 1990s, the phrase had achieved immense popularity in the United States and had become the personal motto of thousands of Christians, who used the phrase as a reminder that, under many interpretations of the Bible, Jesus Christ is the primary guide for morality. The purpose of the phrase is to remind people to act in a manner that Jesus would approve of.
Bracelets with WWJD are popular with some Christian teens. Other paraphernalia with WWJD inscribed are available as well (mugs, rings, bumper stickers, key rings, etc).
Non-Christians sometimes use the phrase to show admiration for the peace-loving and kind nature that Jesus is considered to have had. Others use it sarcastically, or in variations of the form What would [person] do? or to represent phrases from What would Jesus drive? to We want Jack Daniel's in order to criticise or satirise the phrase, its common usage or certain strains of Christianity. "What Would Brian Boitano Do?" was one of the songs in the movie South Park: Bigger, Longer, and Uncut.