Rhymes with Gibbon. Some would refer to a Dibben as being a particle of fecies that clings on to pubic hair that can be found around the anal region.
> "Feels like I have an irritating, annoying, poo smelling itch - I wish this aggravating Dibben would dissapear!"
> "urgh you stink - bit like a Dibben"
> "I wish Dibben would just f*ck off"