Definition of "neandertal" [neandertal]

• Ill-mannered and coarse and contemptible in behavior or appearance (adjective)
• Extinct robust human of Middle Paleolithic in Europe and western Asia (noun)
• Relating to or belonging to or resembling Neanderthal man (adjective)

WordNet. Princeton University. 2010.

• "But that said, I support your attempt to convince neandertal conservatives that their worldview of defensive, hostile-to-other attitudes might be a liability."
• "Brendan: "First of all, it's pronounced neandertal.""
• "Oh, and I looked it up, both "neanderthal" and "neandertal" are acceptable pronunciations and variant spellings."