Dumb Crack Share definition Flag being incredibly stupid. having the intelligence of someone doped up *someone randomly trips nd falls into a trash can...while the trash can was in plain sight*me: "what a DUMB CRACK!" Dumb Crack by 1373204 July 8, 2009 0 0 Get merch Get the Dumb Crack mug. Buy Now — $32.95 See more merch