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).

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.