noun. what your average joe becomes after a long day of heavy drinking, far beyond the point of blacking out, into the stages of projectile vomiting.
Guy1: dude you shouldn't have drank so much last night.
Guy2: why not I feel great.
Guy1: because after that last one you turned into a vomitisaurus rex.
Nothing to do with some hockey player called Matt Owen making a statement in 2003, the word vomitous (with the same intended meaning) has been in common usage in Canberra Australia since early 1997 and possibly before. Sorry about that.