Coastie
noun
Coast·ie
| \ ˈkō-stē
\
\
plural Coasties
Definition of Coastie
chiefly US, informal
: a member of a coast guard
specifically
: a member of the U.S. Coast Guard
When a retired Coastie like me opens a book that presumes to tell the story of the U.S. Coast Guard, it is usually with more than a little trepidation. — Howard Thorsen, United States Naval Institute: Proceedings, November 2009