WJD Share definition Flag An internet slang phase meaning "What Jesus Did" or "World Juggling Day". World Juggling Day isn't used quite as often because its just lame as hell. "WTFWJD!" -Cyanide and Happiness WJD by Jan 'in Juice January 13, 2008 0 0 Get merch Get the WJD mug. Buy Now — $32.95 See more merch