Dumbfutchy Share definition Flag Crap you would get on your shirt or clothes. E.i. glue, bbq sauce, mystery stain. "at work today i got some dumbfutchy on my shirt." Dumbfutchy by A.E.Dunham March 12, 2018 0 0 Get merch Get the Dumbfutchy mug. Buy Now — $32.95 See more merch