Billinghay
Billinghay is a small village in Lincolnshire. The majority of residents are know to have lived there for generations, and some are rumored to be inbred. It has a long history and is mentioned in the Doomsday Book.
Guy1: Oh yeah! I'm from Billinghay
Guy 2: Wtf. Is your sister your cousin then mate?
Guy 2: Wtf. Is your sister your cousin then mate?