Definitions of hiccup:

• noun:   (usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion

  Example: "How do you cure the hiccups?"

• verb:   breathe spasmodically, and make a sound

  Example: "When you have to hiccup, drink a glass of cold water"