troglodyte
/ˈtɹɒɡlədaɪt/noun
University
1
A member of a supposed prehistoric race that lived in caves or holes, a caveman.
2
Anything that lives underground.
3
The Eurasian wren, Troglodytes troglodytes.
4
A reclusive, reactionary or out-of-date person, especially if brutish.
5
A person who chooses not to keep up to date with the latest software and hardware.
#derogatory