This movie features a girl as the main character. I think her name was Cat, because her friend called her kitty cat. She is a fighter. Her manager is a real jerk, who puts drugs in her nasal spray to make her lose a fight, for money. In one of her fights, she ends up biting off a piece of her tongue.
Im sorry. Its not much to go on, but I would really like some help finding the name of this movie.

Rigged (2008) (http://www.imdb.com/title/tt0756707/) ?

That's it. Thank you. It also goes by fight night.

You're welcome.