• (n.) Waste or misapplication of the assets of a deceased person by an executor or an administrator.
Wasting / negligent action
Dev`as·ta'vit noun [ Latin , he has wasted.] (Law) Waste or misapplication of the assets of a deceased person by an executor or an administrator. Bouvier. 
A devastavit is a mismanagement and waste by an executor, administrator, or other trustee of the estate and effects trusted to him as such, by which a loss occurs.
devastavit 1. Waste or misapplication of the assets of a deceased person by an executor or an administrator. 2. Mismanagement or waste of the assets in the estate of a deceased person by the fiduciary in charge of the estate (as the executor).