Both derisory and endearing depending on circumstance. Cunt neck describes someone who is worse than just a plain old cunt, or someone whom you may refer to as a cunt in the course of friendly conversation.
Derisory: C'mon referee they've been doin' it all day ya cunt neck!
Endearing: G'day cunt neck! Feel like a couple of bowls of loud mouth soup?
Endearing: G'day cunt neck! Feel like a couple of bowls of loud mouth soup?
by Butler March 1, 2005
cunt neck is when you are wearing a suit and tie and the flesh of you neck builds up to look like a women's vagina
by sanxity April 2, 2019