A Hull term for anyone deemed mentally sub-normal or mentally ill. Named after the De La Pole hospital, a mental hospital that once existed to the West of the city.

A "Norman" word for "Bellend".....
Discovered on the Bayeux Tapestry by a German named Baron Von Furlonghoffen in 1908....The first Deller was a calamatous knight whoes horse sat on his head before the battle....