madd666 Share definition Flag - (n). A hopeless, geriatric fool who constantly attacks his superiors. That fool madd666 lost his mind long ago. No amount of Geritol can help that addle-minded feeb anymore. madd666 by ploppers March 1, 2010 0 0 Get merch Get the madd666 mug. Buy Now — $32.95 See more merch