Also known as a Post Graduate. Someone who takes another Senior year, usually at another high school.
Types of "PGs":
"Talented athlete"-whom is taking an extra year so that they can get a full athletic scholarship from their #1 college pick; spends time taking easy classes and partying/chilling all senior year.
"Extremely smart foreign student"-whom is trying to make it in America and is most likey going to an ivy; spends time in their room all day and night studying.
"Didn't know what else to do"-Since they didn't get recruited for a sport and didn't have the grades to get into a college, they decided to try it over again. But they will fail again and will end up going to a shitty community college. Spends time thinking they are hot shit and trying to hook up with little freshman.