THE cure for the hiccups.

This works. I've seen it work and I've used it myself.
It's not a glass of water, there's no peanut butter involved, and you don't have to stand on your head.

1. The person with the hiccups takes a deep breath and holds it in.
2. A friend then proceeds to blow air into the victim's mouth. Not too hard, though -- just enough to stretch 'em out a little more.
3. Cured.

The end.