Mountain Teeth
A set of teeth that are discolored and rotten. Often, many or all of them are missing. Primarily found in West Virginia, Kentucky and other Appalachian states.
While traveling through Wheeling, WV, on vacation, I went inside a service station to pay for my fuel and saw a gorgeous girl behind the counter. I decided to flirt with her a little, up until the point she smiled, revealing her hideous mountain teeth. I left.