derivation of the term crow magnon or cro-mag, which is one who bares a resemblence to primative man. A Bro magnon is colloquily used to connote a jock. in popular culture. A bro magnon is usually defined by a desire to gain acceptance among his peers. The Bro Magnon or "Bro-mag" usually "gets all of the girls," which usually means mindless skanks. Bro magnons often engage in gang style rituals to gain status and power withen the tribe.
Look at that pack of Bro magnons, look at those whores on their arms. I bet they don't have a combined I.Q. of 30.

Bro magnons? i hate those knuckle-dragging morons.
by NotoriousBUD June 1, 2006
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When your buddy has become so drunk, he's de-evolutioned.
Hey man, you'd better stop, your pretty much a bro-magnon.
by Jay_H February 9, 2007
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A recent generation of 20-40 year old white males that believe in caveman ideology cro-magnon. They espouse things that they attribute to being "manly" and denounce all other beliefs as weak or un-American. Many believe in conspiracy theories Holocaust/Sandy Hook deniers and outdated beliefs disproved by science flat Earthers.
Matt Gaetz wants to force people to stand for the anthem or face fines? He's such a bro-magnon.
by GDub20 June 14, 2020
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