There are very few things in medicine that can be "cured" and now the hiccups is one of them.
When I was a kid, one of my friends told me she had a surefire hiccups cure, although it only worked once. She said you ask the hiccup-stricken person what they were doing yesterday at 3PM. When they are working this out, their hiccups disappear. This cure absolutely does not work, as far as I know.
However, later I read a study that showed that another particular hiccups cure was effective in 100% of subjects. It's simple and works quickly. And for only $19.99, this cure can be yours!
Just kidding, here it is:
While you are hiccupping, take a deep breath like you usually would to try to get rid of your hiccups. After you take that deep breath though, now take another deep breath on top of that one, to suck in as much air as you can hold. Hold those two breaths worth of air for as long as is comfortable (15 seconds?) then release.
Your hiccups should be gone.
Try it! It works for me 100% of the time.