A hiccup is a common phenomenon that almost everyone experiences some time in life. The exact mechanisms are still not well known, but it is likely caused by an irritation of the phrenic nerve, which supplies the diaphragm, causing it to spasm and interrupt normal breathing.
This can be a very debilitating condition, and such there are hundreds of “remedies”, such as drinking cold water, holding your breath or giving the person a scare. However, these are often ineffective in taking away the ailment.
One thing you can try is pulling your tongue. Although it may sound like a crazy treatment, it stimulates the vagus nerve which can stop a hiccup. However, note that this may be ineffective in many cases as well.
In some cultures, it is said that hiccups are brought on by eating something one stole off another person, or if others are talking about you in a bad manner.
The world record for the longest attack of hiccups is held by Charles Osborne, who had it for 68 years.