1. (n) Facial hair that does not exist on the face, but instead on the neck. Almost never well groomed.

2. (n) Derogatory term for slovenly nerdy people who have no sense of hygene or grooming. Often related to hobbies such as card gaming, video gaming, anime, et. al.

Facial hair that extends underneath your chin and onto your neck.

The hair on the back of ones neck. Usually connects to back hair. It is unknown as to whether or not the neckbeard is formed from the hair on the back or from the hair on the head. Neckbeards are easily controlled with regular and proper maintenance.

Kyle Orton's alter ego, backup quarterback for the Chicago Bears

suddenly a wild tom apears

A noticeable growth of hair on a persons neckal region. Usually the face is well groomed but they decide not to groom the neckal area. No one knows why for sure but professionals have speculated that it might be afraid that they are afraid of cutting their neck over childhood scarring. The hair that grows on the neck is also referred to neck pubes.