Colourful barf, or barf on a colourful backdrop. For example throwing up after drinking a hot pink slurpee. Especially after visibly trying not to upchuck...
See also: Technicolor yawn.
I felt sick, my roommate told me I was dehydrated from drinking last night and gave me a Crush Cream Soda slurpee. I managed to drink 3/4 of it before I started heaving pink slurpee all over my white bedsheets. My roommate laughed and said 'Nice - Disney hiccup!'