Read the dictionary definition of slough. All definitions for this word.
1. any outer covering that can be shed or cast off (such as the cast-off skin of a snake)
2. a stagnant swamp (especially as part of a bayou)
3. a hollow filled with mud
4. necrotic tissue; a mortified or gangrenous part or mass
5. cast off hair, skin, horn, or feathers
1. our dog sheds every Spring