What does but i'm a cheerleader mean?

but i'm a cheerleader meaning in Urban Dictionary

1. a good movie with a few chick and Clea DeVull, about probably a gay-brainwashing camp to make you straight and how both of these say shag it and obtain it on with each other.2. a cheerleader/sorority sis who'll refuse to be labelled as bisexual or a lesbian yet still insists on fucking a girl every nite.