Slimy pests are often referred to as snails, which is a term used to describe a variety of gastropod mollusks. Snails have a soft, slimy body and a single coiled shell on their back. They are usually found in damp environments and can be found in gardens, forests, and even in the ocean. Snails are considered to be a nuisance by many gardeners due to their ability to eat plants and cause damage to crops.