Break dancing
A fo-sport for those who are not necessarily out of shape, but lack skills for other sports. Because it is a fo-sport, those who are capable at it do not consider themselves "jocks" rather rebels. Indeed, these people are rebels without a cause, and most of them in turn will fail at life.
Person 1: Man, Johnny wasn't looked really athletic, but he got cut from Basketball, Football, AND Baseball!

Person 2: I know. I heard he felt so bad, he got into Break Dancing.

Person 1: So that's why he think's he so cool!