Do a deck is a term used to describe the job of scrubbing and cleaning a wooden deck. The term is often used in the context of maritime work, where swabbing is the act of using a mop or cloth to clean the deck of a ship. Swabbing is an important part of keeping a ship clean and safe for passengers and crew. In addition to swabbing, other tasks such as painting and staining may also be required to maintain the deck.