Someone who is addicted to plastic surgery and their lips are fucking blown out from getting too much botox injected.
Connie used to be a beautiful woman but now shes a crackhead in rehab who was addicted to plastic surgery and all of the other patients are disturbed by her fish lips.
When a woman is giving a blowjob, and applying a great deal of suction, the expression of her face, especially her mouth, makes on the upstroke is called fish lips.