Nominal Muslims who identify themselves as Moslems but don't follow many of the Islam rites and rituals as opposed to santri Moslems who tend to be more religious.

The Abangan are the population of Javanese Muslims who practice a more syncretic version of Islam than the more orthodox santri. The term, apparently derived from the Javanese word for red, was first developed by Clifford Geertz but the meaning has since shifted. Abangan are more inclined to follow a local system of beliefs called adat than pure Sharia (Islamic law).