My Room mate smells...BAD.

I think my room mate has that "smell". It is REALLY bad. My room is right across from hers and my door is ALWAYS ALWAYS ALWAYS shut. lol. She leaves her room door wide open and I have to hold my breath when I get near it and close it. Seriously, I am NOT kidding it is totaly like this. My other room mate (a guy) couldnt figure out what it was until we asked a few of our girl friends to come and take a whiff. They said that that is most likely what it is...PERIOD! Eww. You know it is really bad when you turn on the central heating and the smell seeps through the air vents and into your room. Id rather freeze to death.