Coach Face
A reference to the character in Left for Dead 2, who usually has an expressionless face. If someone would have no expression on their face they would be "coach faced".
Man: "My girlfriend had a Coach Face during sex last night, apparently my dong is too small".
Coach-Face
Someone who has leather-like skin similar to a handbag of or about the face.
man that bitch spent too much time in the fake-bake - she's all coach-faced