A disease that is usually inherited at a young age it starts when the patient is a infant and a black ring forms around the neck, as the patient grows so does the black circle and eventually covers the whole back of the neck.
Person 1:Man have you seen Xavier and Anthonys neck?
Person 2:Yea man it's so black!
Person 3Talk about a dirty neck!
A hard slap on the neck when some one is being stupid or dumb
WTF! why did u do that i m going to give u a dirty neck