H to 10 Share definition Flag Slang for Hell. Used by two people in Edmonton Alberta. What the H to 10 is that thing on your face? What the H to 10? What the H to 10 do you think you're doing? H to 10 by cfoam August 20, 2008 0 0 Get merch Get the H to 10 mug. Buy Now — $32.95 See more merch