What is "slebech"

Slebech was a community (prior to 1974, a parish) in Pembrokeshire, Wales, which is now part of the combined community of Uzmaston and Boulston and Slebech. Uzmaston and Boulston and Slebech is a sparsely populated community on the northern shore of the Eastern River Cleddau which shares common land boundaries with the Communities of Wiston and Llawhaden and mainly consists of farmland and woodland. Much of the community is within the Pembrokeshire Coast National Park and Picton Castle's stable block loft is an important breeding roost for the rare Greater Horseshoe Bat.