A bit of sugar seems to somehow influence the nerves involved in a hiccup, as well. Has always worked for me. Half a teaspoon or some other source of sugar seems to work, for me.
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That really does seem to do the trick - even a mouthful of grape juice will do it.
Bend over in ass less chaps in front of a gay pride parade. The impromptu marathon run is sure to cure the hiccups.