Standard caucasian lips.
Lips reminiscent of the lips of a standard adult Pan Troglodytes (aka Chimpanzee or as commonly known "Chimp") which are typically barely visible from more than one meter away.
They are referred to in genesis. The good book has spoken.
Notably personified by the greatest comic book icon of all "The Joker". Here we have a man who literally pencils his features on.
Chimp-lips is often shortened to "Chimips".
Bubba: Ima looking for my sistah, have you seen her?
Man: Look here chimp lips, you and I both know that practically everyone has seen her.