West Coaster
/ˌwɛs(t) ˈkəʊstə/noun
1A person who lives on or comes from the west coast; especially (a) (NZ ) a native or inhabitant of the western or south-western coast of the South Island of New Zealand; (b) a native or inhabitant of the west coast of the United States, especially California.
2A player or devotee of West Coast jazz.
Origin
Mid 19th century. From West Coast + -er.