When your neck is so fat that you have a flap of fat around your neck, usually in the back of your neck. that only occurs when you eat too many cats of the name Hailey. to get rid of that flap you have to lie in the sun for twelve hours.
hailey: "is my neck obease because i dont have a mirror.
suzie: "yeah you have an obease neck...."
hailey: |lets go lie under the sun!"