There are lots of different characteristics inside the campus.

There are the famous ones because they've got the looks.
There are some famous because of basketball. Some were because they were talented.

And of course, it won't be complete if it won't have some who got a... okay let's say, less look. Not looking good. Weirdos. And so on with the low class looks and personalities..

"What the heck is DUFF?! What do you mean by that?!" She asked, really confused of what he meant.

"DUFF means Designated Ugly Fat Friend. And that's clearly you. You're the DUFF within your bestfriends. Can't you see that they are using you for them to be good looking? Of course when they were with some as ugly as you, their beauty will be more obvious. They are always asking for favors and you're the DUFF who will always do their favors. But don't worry, I know a lot of DUFFs in school." He winked. But before he could even go away, she threw her glass of water on him.

"JERK!" She walked away and went home really depressed of what she just found out.