Father Earth, the solid ground of reality we all are met upon. Together with Nut, the sky, Geb is the father of gods and humanity. As The Great Cackler, he represents the mysterious and profound capacity of consciousness to waken itself out of the dark substance of the soul.
Amongst the group who believed in the Ennead, a form of Egyptian mythology centred in Heliopolis, Geb (also spelt Seb, and Keb) was the personification of the earth, and indeed this is what his name means - earth, and thus it was said that when he laughed, it caused earthquakes. Since the Egyptians held that their underworld was literally that, under the earth, Geb was sometimes seen as containing the dead, or imprisoning those not worthy to go to Aaru.