fartknocker Share definition Flag a term used from Dungeons and Dragons to refer to a character that tries too hard. Man that fartknocker's helmet is so big and goofy looking he can't even tell if he's fighting an orc or a lamppost. fartknocker by Doug Bailey May 5, 2005 0 0 Get merch Get the fartknocker mug. Buy Now — $32.95 See more merch