when drinking beer, and you have an acid reflux or alittle throw up, but it's just foam. it's called a fomit, used in the same context as vomit, but it's just foam, nothing else
dude, don't fomit all over my shirt! i just got it yesterday.
he's got a little fomit on his chin, but he's cool.
The act of having sex with a woman while she is hunched over puking her guts out. Fomit is traditionally only performed in the doggie style position, but there have been reports of it being performed in other sexual positions.
My girlfiriend got too drunk tonight and wouldn't leave the toilet, so I decided that I was just going to fomit her right there, fuck it.