shellback
nounUK /ˈʃelbæk/
US /ˈʃelbæk/
A shellback is a sailor who has crossed the equator on a ship.
After crossing the equator, the old sailor proudly called himself a shellback.
RELATED WORDS
OTHER MEANINGS
2. A turtle or tortoise, especially one with a hard shell.
The shellback slowly crawled across the sandy beach.
3. A person or animal with a shell-like back or covering.
The little shellback beetle hid under a rock.
4. An old, experienced person who is set in their ways.
Grandpa is a real shellback when it comes to using new technology.