What would you think of a girl who acted like this in public?

Well there is this girl in my school who has become rather popular, and it really confuses me because she is just gross in my opinion. She has a pretty face I will admit, but she's a little chubby, not fat just chubby. But anyways she's one of those girls who always try's to prove to people she can act like a guy to. She always burps really loud in cl, admitted to a bus full of students she farts in front of her boyfriend, chews with her mouth open and makes that gross noise with it to, wears to tight clothes, can be obnoxiously loud and rude to anyone who isn't somewhat popular, surprisingly she is going to be cheerleader also. I guess guys could consider her fun she plays football, has a fun personality if you know her and is quite outgoing, outrageously large , but still I just think she is gross. How do people consider her popular, I mean how is it not repulsive to be around a girl so improper? I don't mean to sound stuck up, but she just seems nasty in my opinion? How would you feel about a girl like this?