Trench mortars were widely used during World War I. However, there are other terms that are used to describe this weapon in the context of military history. These include the Stokes mortar, a type of trench mortar widely used by the British Army, and the "toffee apple" mortar, which was used by New Zealand and Australian troops. Other names for trench mortars include the "plumber's nightmare", "flying pig", "plumber's friend" and "devils own" - reflecting the feeling of dread they inspired among troops in the trenches. Despite the colorful terms, trench mortars were a deadly and effective weapon used to inflict serious damage to enemy positions during the war.