Someone who does absolutely nothing with their life, has no job, no future, and always tries to find a way out of having to get a job. Because only men can have a full neck beard (there are of courseexceptions) they are usually the ones referred to as a neck beard.
Man my friend is such a neck beard that he took out yet another loan to pay for his tattoos as well as another speeding ticket he got last week
1. A long beard that reaches to the owner’s chest; a beard that essentially hides the neck.
2. The wearer of a long beard.
A term used to describe the long facial hair of some eccentric engineers and computer scientists -- especially on university campuses in the 70s -- who are so buried in their scientific work that they simply neglect to shave for months or even years.