noun. A person who, through no fault of her own--and yes, this is probably a her--is forced to repel repeated amorous advances from cavemanly critters.
Related terms: nutjob magnet, wingnut magnet, fucknut magnet, loser magnet, asshat magnet, asshole magnet, doofus magnet, dork magnet, dumbass magnet, skank magnet, ho magnet, bad kisser magnet.
Real citation: “Are they all like this, or am I just a Neanderthal magnet?”
(Dec. 16, 2002, http://www.council-of-elrond.com/forums/archive/index.php/t-1892.html)
Made-up citation: "Evolutionary biologists are unable to explain neanderthal magnets, self-flushing toilets, and butt bras."