This is the new version of the original "I Wish" game started by CarrotRed.
In essence, you've got a magic lamp that will grant your wish, but the genie (the next poster) is a douchebag. You grant the wish of the previous poster in the worst way possible.
I wish I had a big old sandwich!
Well you'd better get used to tupperware, buddy, because you're a big old ham on rye now!
I wish I had a luxury car.
Well you do, but it's drawn on a piece of loose-leaf paper.
I wish I was taller.
And so forth. I'll start.
I wish I was less afraid of heights.