1) Facial hair that only grows undeneath the chin.
2) A synonym for a double chin
, a neck that looks like a beard of flesh.
1) person 1: damn, that geek brother of mine has a horrible neckbeard. he can't even grow a real one.
2) person 2: yeah, he ate too much and grew a flesh neckbeard
person 1: he's guilty on both counts