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
The word "Zabaniyah" may have been derived from the syriac "shabbāyā," used to describe angels who conduct the souls of the dead or as frightening demons. Another suggestion attributes the origin to "rabbāniyya" referring to the lords angelic council. Further "Zabaniyah" may refer to a class of Arabian demons. According to a recent etymological suggestion, this term may derived from Sumerian "zi.ba.an.na" ("The Scales") and Assyrian "zibanitu" meaning "scorpion". Thus, it is suggested that Zabaniyah are originally astrological figures with their lord Maalik symbolizing the Mars, that reigns the "scorpion" in the astrological imaginations. On the other hand, nineteen Zabaniyah also originated from astrological map. In ancient concept, the seven planets and twelve astral houses together corresponded to the number nineteen. Al-Mubarrad suggested, "zabāniya" could derive from the idea of "movement" and the Zabaniyah are those who "push somebody [back]".