1. an extinct species of human that was widely distributed in ice-age Europe between
circa 120,000–35,000 years ago, with a receding forehead and prominent brow ridges.
The Neanderthals were associated with the Mousterian flint industry of the Middle Paleolithic.
2. an uncivilized, unintelligent, or uncouth person, especially a man.
“the stereotype of the mechanic as a macho Neanderthal”
Also used as an adjective: “a neanderthal attitude”, “neanderthal behaviour”
Pardon the gender discrimination. 😛
There are women who also fit this description, but we call them something else. 😉
See also JUSTIFICATION
As mentioned, I have encountered these neanderthals mostly online (Trolls), but also in the corporate world. They are chauvinistic, rude and bigoted, spouting extreme opinions and heaping abuse on anyone who dares to disagree. Their aim is to upset you and drag you down in the mud with them. Never give them the satisfaction! Rise above and dazzle them with your intellect! Laugh at their insults and always remain courteous. That really makes them crazy! 😀
Psychology of an internet troll:
Origin: German Neanderthal “Neander Valley”, gorge near Düsseldorf
(close to my birthplace), where humanoid fossils were identified in 1856.
Circa 1926, neanderthal became popular British slang for a “big, brutish, stupid person.”