The Slayer's Slab is a title given to a medieval gravestone formerly in the graveyard of Lyminster

Lyminster

Lyminster is a village and civil parish in the Arun District of West Sussex, England. It is located on the outskirts of the built-up area of Littlehampton, two miles north of the town centre. The civil parish covers an area of and has a population of 351 persons...

 church in West Sussex

West Sussex

West Sussex is a county in the south of England, bordering onto East Sussex , Hampshire and Surrey. The county of Sussex has been divided into East and West since the 12th century, and obtained separate county councils in 1888, but it remained a single ceremonial county until 1974 and the coming...

, England

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

. It has now been moved inside the church to protect it from weathering.
According to legend it is the gravestone of the dragonslayer who killed the Knucker

Knucker

Knucker is a dialect word for a kind of water dragon, living in knuckerholes in Sussex, England. The word comes from the Old English nicor which means "water monster" and is used in the poem Beowulf.-Knuckers in folklore:...

 who lived in the nearby knuckerhole.
The stone has a cross on it overlaying a herring-bone pattern, but no inscription to identify the tomb's occupant.