Hiccups are caused when our diaphragm – a large muscle across the chest – starts contracting in jerks, instead of moving smoothly up and down. To stop hiccups, one has to shock the diaphragm back to its normal movements. There is no sure-fire cure for hiccups, but some things that can work include a good scare, drinking water while someone plugs your ears, eating a spoonful of crushed ice, sucking a slice of lemon and holding your breath for a few seconds.
More reading:
Hiccup (Wikipedia)
More reading:
Hiccup (Wikipedia)
