A spoonful of sugar is a popular hiccups cure because its graininess could slightly irritate the esophagus, causing the phrenic nerves to “reset” themselves, although there is no proof of this.
Take a teaspoonful of vinegar. Its sour taste could stop a hiccup in its tracks.
A classic hiccups cure involves eating a big spoonful of peanut butter. In the process of chewing and getting it off your tongue and teeth, your swallowing and breathing patterns are interrupted. And hence, the hiccups will be history.
This probably works because the heat and burn are distracting enough to turn your body’s focus on the burn, instead of the hiccup process.