The rules of the game are easy: Some one makes a wish and then some one makes a silly, funny corrupted version then make their own wish. It'd go something like:-
Person:- I wish I didn't have to do Homework. Next Person:- Granted! However due to not doing homework you're plagued by your parents forever. Oh the horror. I wish I-
So on and so forth.
So I'll start.
"I wish I had a pet dragon that I could fly around on."
Wish granted. However, the dragon bites you mid-flight. The bite gives you a disease that slowly eats your insides. There's no cure. I wish I could beat dumbasses in the head with a stick.
Wish granted but you gain the power to attract small animals. Which then pounce you because it is mating season and you get molested by lots of small animals.