Urban sludge hammer Share definition Flag It is when you put something large in the girls vagina and hit it with a sludge hammer. Hey bro tonight Alyssa is gonna get Urban sludge hammered with a cucumber! Urban sludge hammer by Cock and/or balls $$$$$ October 19, 2016 0 0 Get merch Get the Urban sludge hammer mug. Buy Now — $32.95 See more merch