Sage, there is a list of 339 online, but many of them are made up. I don't think they should be listed unless someone's actually used them in speech.
http://www.c4vct.com/kym/humor/puke.htm

Some I recognize:
The big spit
Liquid laugh
Lose your lunch
Oral diarrhea
Rainbow retch
Toss up
Do the tummy toss