Who is Fair-Go Dibbler from The Last Continent: A Discworld Novel and what is their importance?

In the capital city of Bugarup on the last continent of Discworld, Fourecks, the hapless protagonist Rincewind the Wizzard meets a relative of the famous (and infamous) Throat Dibbler of Ankh-Morpork. Wearing a sign, "Dibbler's Café de Feet," Fair-Go is out early hawking authentic rope from the festive hanging at which Rincewind is to be the centerpiece. The rope is clearly a length of clothesline. Dibbler next tries to sell Rincewind a painting of fish and chips and a local delicacy, meat pies floating in pea soup with tomato sauce over the top. Rincewind has already tasted this in jail. Rincewind does not mention that he is the intended victim and is on the run from the police.