A sub-type of Nāma (body-making) Karma, the rise of which is responsible for the reincarnation of the soul in any one of the four kinds of Gati (2) (realm of mundane existence) such as infernal etc...
narakagatistiryaggatirmanuṣyagatirdevagatistajjanakaṃ nāma gatināma.
(Prajñā 23.38 Vṛ Pa 469)