- a beard consisting only of facial hair on the neck.
- a beard that includes hair on the neck, but may also consist of other components.
- derogatory term for a nerd. This term arises from their (stereotypified) poor hygiene skills, which (on males of the facial-hair-producing age) leads to natural overgrowth of unkempt facial hair on the neck.
-- Walter (email@example.com)