disinfotard Share definition Flag disinfotard (diss in fo tard) NOUN. A person so gullible they believe every lie they hear. You actually believed Iraq attacked us on 9/11? You are such a disinfotard. disinfotard by Maxhole June 19, 2009 0 0 Get merch Get the disinfotard mug. Buy Now — $32.95 See more merch