Matangi Devi

Matangi Devi Matangi is the Goddess in the form of an Outcaste (Chandala), and in Tantra, represents the Ucchishtha, or leavings of the sacrifice. In this regard, the great Ucchishtha Sukta of the Atharva Veda, relates to her, similar to how the Kamasukta of Atharvaveda is relates to the Lalitavidya. http://us.geocities.com/rigvedsamhita/matangi.htm