Noun
The wren.
One of any savage race that dwells in caves, instead of constructing dwellings; a cave dweller. Most of the primitive races of man were troglodytes.
An anthropoid ape, as the chimpanzee.
Source: Webster's dictionaryI seem to myself, among civilised men, an intruder, a troglodyte enamored of decrepitude, plunged into subversive prayers. Emil Cioran
The human mind is still something of a troglodyte. Expelled from one falling cavern, its first thought is to find another. G. M. Young
There's a fine line between what would characterize you as a troglodyte and what would characterize you as a brilliant, avant-garde, forward-thinking genius. There's some middle ground. Michael Eisner
Made famous by "Star Wars," these troglodyte homes face an uncertain future. Source: Internet
Yes, your friend could be described as out of date, but the word “troglodyte” has a lot of dark overtones. Source: Internet