Dumbfuck Dumptruck Share definition Flag Noun : When you are such a colossal idiot that you have to carry your stupidity in a dump-truck. I called the dog a dumbfuck dumptruck when he bit my hand while I was trying to pet him. Dumbfuck Dumptruck by Ulfhersir October 12, 2021 0 0 Get merch Get the Dumbfuck Dumptruck mug. Buy Now — $32.95 See more merch