From Leopard Gecko Wiki
An Aberrant Leopard Gecko is a Leopard Gecko which has a broken pattern. Most commonly, Aberrants are seen in Mack Snows and Normals. The broken patterns can occur in either the tail or on the body but not in both places. The difference between an Aberrant and a Jungle is that Jungles have the body and tail pattern broken, Aberrants just have 1 of them broken. A common broken pattern on the Leopard Gecko's body is a circle back.
- JK Herp. <http://jkherp.com>