Caveman

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."

A brutish or savage person.

"The football squad was made up of cavemen who were responsible for trashing many a locker room."

A man with old-fashioned or backward opinions, particularly with regard to women.

"Old Sven is a bit of a caveman; he figures giving women the right to vote was a bad idea."