What is Vominoes?
1.
When you vomit on the back of the head of the person in front of you, and he in turn vomits, as does the person in front of him (ad infintum) thus creating a 'domino-like' effect.
"I was standing in line for assembly when all of a sudden I was sick all over the back of the boy in front of me. He was then sick and it started a whole chain reaction rather like dominoes... Vominoes!"
"...The last one had a kind of double kick. Came straight out of his nostrils, over the shoulders of the boy in front, thus breaking the chain!"
See