I don't even understand the existence of neckbeards. Is this people that can't grow a beard but in that area?
A Neckbeard (also known as a neard, a portmanteau, or the bloatee) is the strange under-the-chin hair growth only seen on fatties, drug addicts with a messianic complex and UNIX programmers.
The purpose of this beard is to delineate the neck from the chin when the two have merged due to obesity, forming a bullfrog neck. Wearers hope it will make them look like a badass from Hackers or The Matrix, yet it merely reminds observers of fucking chin lack.
A neckbeard is to beards as the comb-over is to hair. It is never, ever cool.