Hiccoughs, also known as hiccups, are involuntary contractions of the diaphragm muscle that result in a sudden and noisy inhalation of air. There are various synonyms for hiccoughs, including singultus, which is a medical term, and also yawns, burps and belches. Hiccups can often be stopped by simple remedies such as holding one's breath, drinking water, or being startled. However, persistent hiccoughs can be a sign of a more serious underlying health issue and should be addressed by a medical professional. Regardless of what you call them, hiccoughs are an annoying and sometimes painful nuisance that we all experience from time to time.