What is Butler's Ordinance?

Legal Definition
In English law. A law for the heir to punish waste in the llfe of the ancestor. "Though it be on record in the parliament book of Edward I., yet it never was a statute, nor ever so received; but only some constitution of the king's council or lords in parliament, which never obtained the strength or force of an act of parliament" Hale, Hist. Eng. Law, p. 18.
-- Black's Law Dictionary