Urp.
Singing the bucket aria.
Woof yer cookies.
I have heard boating enthusiasts refer to “feeding the fish” in an understated sort of way.
Tris
This is a list of common terms among my friends over the years. Many have been covered already.
Feeding the Fishes: Navy and Sailing
Upchucking
Puking
Power Puking
Praying to the Porcelain God: Repetitive vomiting into the toilet bowl.
Tossing your Cookies
Beer drinker’s diet
Blowing Chunks
Ralphing
GIGO: one Linux geek I know that is a big beer binger uses this term. It is of course, Garbage In Garbage Out.
Jim
The Big Spit
Shouting “Hughie”<<<<<<< say that loud. you’ll unnerstand
I always kind of liked “Involuntary personal protein spill.” 
When on a boat: calling whales
Variant of two aforementioned: ordering buicks on the big white phone
Delivering street pizza.
Love it. Would that be hand tossed?
My favorites:
[ul]
[li]Blowing chunks[/li][li]Eating backwards[/li][li]Hurl[/li][li]Spew[/li][li]Technicolor yawn[/li][li]Tossing one’s cookies[/li][li]Upchuck[/li][/ul]
Haha! So what do you call a voluntary personal protein spill?
THAT we call bulimia nervosa.
I always liked “calling dinosaurs”.
Just imagine what the mating call of a T-Rex sounds like.
Man, I always though it was women glow…
We use the term ‘booting’ as in ‘As soon as the driver pulled over, I opened the door and booted everywhere.’
I like ‘tossing one’s cookies’ though.
My personal fave:
Excuse me, I have to place a call to Europe.
YUURRRUUUUPPPPP!
And still nothing better than “Calling Ralph and Huey on the Big Porcelain Phone.”
Another mild euphamism I used to hear was “Sharing his lunch.”
Tris
Ever since I saw the chocolate Scharffen Berger, I’ve thought that was a great euphemism for hurling.
“Dude, I had a rough night last night - I scharffenbergered all over this chick!”
I’m voting for
sislatsirep
Si