A person who has an attractive face but everything else about their appearance is not appealing.
"Damn did you see that fat bitch?"
"Ya, she probably weighs 1000 lbs"
"True but she had a pretty face"
"Ya, but she's a fucking waste o' face!"
NOTE: A waste o' face is only good for head
Before you creep on a girl you find on myspace/facebook, check to see if all her pics are head shots...if so... you might be dealing with a waste o' face.