In Arab folklore, the Nasnas (Arabic: النَّسْنَاس an-nasnās) is a monstrous creature. According to Edward Lane, the 19th century translator of The Thousand and One Nights, a nasnas is "half a human being; having half a head, half a body, one arm, one leg, with which it hops with much agility".
Nasnas means in Arabic a type of small monkeys. It is also used for imagined beings who have no heads and have one leg. It is mentioned in some Muslim books for Gog and Magog (according to narration frm Abu Huraira).
In general, Nasnas is mentioned for bad persons as the narration says: Naas ( people) have gone, and Nasnas remained).