Igigi was a term used to refer to the gods of heaven in Sumerian mythology. Though sometimes synonymous with the term "Annunaki", in one myth the Igigi were the younger gods who were servants of the Annunaki, until they rebelled and were replaced by the creation of humans.
Igi means (eye) in both Sumerian and Akkadian languages, gi stands for (penetrate sexually). Therefore, Igigi could be translated to (Eyes in the sky, the watchers, who deflower).
Sumerian paradise is described as a garden in the myth of Atrahasis where lower rank deities (the Igigi) are put to work digging a watercourse by the more senior deities (the Anunnaki).
When the gods, man-like,
Bore the labour, carried the load,
The gods' load was great,
The toil grievous, the trouble excessive.
The great Anunnaku, the Seven,
Were making the Igigu undertake the toil.
The Igigi then rebel against the dictatorship of Enlil, setting fire to their tools and surrounding Enlil's great house by night. On hearing that toil on the irrigation channel is the reason for the disquiet, the Anunnaki council decide to create man to carry out agricultural labour.