smarfy
When you don't hang a drying towel or rag up after using it to clean or dry with. If you leave it balled-up or in a heap on the countertop, it becomes smarfy (the smell that emanates from a damp rag or towel when you don't allow enough air to hit it to dry properly).
Please hang the hand towel up (to air out), or it will become smarfy.