caveman

1. An early human or closely related species, popularly held to reside in caves. · The political cartoon showed the politician as a caveman, clubbing the budget depicted as a mammoth.
2. A person with backward, primitive behavior, opinions, or interests. (figuratively, informal)
3. A brutish person, one who behaves in a rough, uncivilized way. (figuratively, informal) · The football squad was made up of cavemen who were responsible for trashing many a locker room.
4. Someone, especially a man, who has regressive, old-fashioned attitudes, particularly with regard to women; someone opposed to change or modernity. (figuratively, informal) · Old Sven is a bit of a caveman; he figures giving women the right to vote was a bad idea.· Pat is a real caveman when it comes to tech, and refuses to get a smartphone.

Plural cavemen