Both the inflammation and the odor arising from the unwashed, uncut (uncircumcised) penis. A result of the build up of smegma.
Dude, wash yourself completely so you don't get that nasty smegmatosis you're always complaining about. OR I would give him head, but he stinks of smegmatosis!
A man with an absurd amount or smegma (dick cheese) which is used to make 3D models of Sharks. It is commonly used as an insult towards the uncircumcised smegma havers.
Person 1: "Damn bro, I have a lot of smegma."
Person 2: "You should become a Smegmadon"