Zabbaleen
The Zabbaleen ( ', ) is a word which literally means "garbage people" in Egyptian Arabic. The contemporary use of the word in Egyptian Arabic is to mean "garbage collectors". In cultural contexts, the word refers to teenagers and adults who have served as Cairo's informal garbage collectors since approximately the 1940s. The Zabbaleen (singular: ', ) are also known as Zarraba (singular: Zarrab), which means "pig-pen operators." The word ' came from the Egyptian Arabic word ' (, ) which means "garbage".
Zabaniyya
Prior to the anglification of the Zabaniyah, they were probably thought as a kind of demon. Al-Mubarrad relates them to Afarit, a type of underworld demon still prevailing in later Islamic thought. He states that Afarit are sometimes referred to as "ʿifriyya zibniyya", "" denoting "pushing back" as their characteristic action.