coaster : A person who originates from or inhabits a coastal area. (slang, dated) A prostitute, especially a white woman, plying her trade in Chinese port towns. (nautical) A sailor (especially the master or pilot of a vessel) who travels only in coastal waters. A merchant vessel that stays in coastal waters, especially one that travels between ports of the same country. (Canada, US) Short for coaster trout (“the brook trout (Salvelinus fontinalis) in Lake Superior and Maine”). [...] Agent noun of coast: one who coasts. (Australia, slang) An itinerant person who shirks work but still seeks food and lodging; a loafer, a sundowner. (US, winter sports) A person who uses a sled or toboggan to slide down a slope covered with ice or snow; a sledder, a tobogganist. Something that coasts or is used to coast. (dated) A small stand or tray, sometimes with wheels, used to pass something such as a decanter or wine bottle around a tabletop. (by extension) A small, flat or tray-like object on which a bottle, cup, glass, mug, etc., is placed to protect a table surface from drink spills, heat, or water condensation. (computing, slang) A useless compact disc or DVD, such as one that was burned incorrectly or has become corrupted. (US, informal) Short for rollercoaster. (US, winter sports) A sled or toboggan. Today, the last Thursday of September in 2021, is World Maritime Day, which is recognized by the United Nations to highlight the work of the International Maritime Organization and emphasize the importance of shipping and other maritime activities.
https://en.wiktionary.org/wiki/coaster#English