That's why you dont give ugly people mirrors

Classy.

Sounds like it's time for a talk.

..And perhaps a new roommate.

Id kick her out lol

I'd rather "teach her a lesson" instead of throwing her out. Maybe something along the lines of forcing her to clean up her own throw up with a toothbrush and some thin napkins.

#39 OP is her roomate not her parent if my roomate tried to make me clean something with a toothbrush for "punishment" (even if I deserved it like OP's roomate) I would tell her to go fuck herself. Parent/child discipline doesn't really cross over to relations with peers.

39, kicking her alcoholic ass out IS teaching her a lesson. You can't force someone you love with who pays rent to do something for being a cunt, she's not the OPs child.

sounds like Someone had a good time last night.

It amazes me how people associate that with having a good time. How is puking, blacking out, not remembering anything, having a hangover and massive headache in any way a good time?! I can have a really good time and after I experience none of those issues.

Scoop all the vomit into a bucket and pour it back onto her face while she's sleeping.
Maybe she'll learn the lesson. Or she will wake up and won't remember a thing. Win/Win

...or wash your vag with it...

Use one of her shirts to clean it up then she might learn to do it herself next time.

That's fucked. Talk to her about it

Leave it there a few days and use the gym showers if you can (or other alternatives). That should teach her a lesson

I don't think letting the smell of someone else's throw up permanently sit in your house and all over your bathroom floor is a good alternative to just talking to your roommate about cleaning it up.