Overweight chicks who wear tank tops/shirts that expose their bellys. I'm all for thick chicks but come on
Fat guys who don't wear underwear. It seems like there's a correlation between fat and not wearing underwear, at least when it comes to the dudes who sit in front of me in class. It's not like I'm searching for their junk either - it's all in my face.
Loud ring tones. I fail to see the point in interrupting a class with your loud "i was gettin some head, get gettin some headdd" ring tone, only to shut it off as fast as possible - but not before taking my mind off my work. Why not put it on vibrate.