The dihydrogen monoxide parody is a parody that involves referring to water by its unfamiliar chemical systematic name "dihydrogen monoxide" (DHMO, or the chemical formula H2O) and describing some properties of water in a particularly concerning manner — such as the ability to accelerate corrosion (rust) and cause suffocation (drowning) — for the purpose of encouraging alarmism among the audience to often incite a moral panic calling for water to be banned, regulated strictly or labeled as a hazardous chemical. Occasionally, reports also reference its widespread contamination of rivers or municipal water supplies. The parody has also involved other uncommon chemical nomenclatures for water such as "hydrogen hydroxide", "dihydrogen oxide" and "hydric acid", used in many prank shows to scare people into thinking that it is a lethal or corrosive substance.