A lip neck is when someones lip and neck look connected. There is so much excess fat between someones chest and chin that it gives the apperance of no neck.
http://www.youtube.com/watch?v=hvjqiJQXR30
John: Wow, i ate 72 boxes of christmas tree debie snack cakes!
Homer: I can tell, you have a lip Neck now.
John: Wow, i ate 72 boxes of christmas tree debie snack cakes!
Homer: I can tell, you have a lip Neck now.
by Crystal423 February 10, 2009