A girl/guy whose attractiveness gives them a high score on a scale of 10...but only because they live in a small town where everyone is kind of fugly. But put them in the nearest big city, and their score is cut in half.
I was at a bar in Pigfuck, Iowa, that had a bunch of girls who were pasty and had lots of zits. They were hot for the area, but were still Big City 5s.
