Ab Irato

Civil Law. Lat. phrase which signifies by a man in anger. It is applied to bequests or gifts, which a man makes adverse to the interest of his heir, in consequence of anger or hatred against him. Thus a devise made under these circumstances is called a testament ab irato. And the suit which the heirs institute to annul this will is called an action ab irato.
   

This entry contains material from Bouvier's Legal Dictionary, a work published in the 1850's.