Wiktionary
prep.phr. (context legal of a position supposedly granted or imposed by a queen English) indefinitely
Wikipedia
At Her Majesty's pleasure (sometimes abbreviated to Queen's pleasure or, when appropriate, at His Majesty's pleasure or King's pleasure) is a legal term of art referring to the indeterminate length of service of certain appointed officials or the indeterminate sentences of some prisoners. It is based on the concept that all legitimate authority for government comes from the Crown. Originating in the United Kingdom, it is now used throughout the Commonwealth realms. In realms where the monarch is represented by a Governor-General, Governor or Administrator, the phrase may be modified to be at the Governor's pleasure, since the governor-general, governor, lieutenant governor or administrator is the Queen's personal representative in the country, state or province.
Usage examples of "at her majesty's pleasure".
If you return you are formally warned you do so at your peril and are liable for arraignment and imprisonment at Her Majesty's pleasure.
Anyone who did not disperse within forty-five minutes was liable to immediate arrest, incarceration, and, if proven guilty, to either a sentence of death or to being sentenced to transportation for life at Her Majesty's pleasure.
You'll go to Broadmoor at Her Majesty's Pleasure, and of course Her Majesty will be thinking of you constantly.
Van Effen said: 'Samuelson is rather concerned about the non-arrival of Ylvisaker and his friends who, I think we may take it, are at present being detained at Her Majesty's pleasure.
In Britain, the case of Derek Bentley and Christopher Craig, two teenagers who were involved in the murder of a policeman in 1952, became the subject of a highly controversial casewith Bentley, nineteen, being hanged though he had played no direct part in the violence, and Craig, sixteen, who had actually fired the gun, `detained at Her Majesty's pleasure' because he was under age.
He and William Connor were both detained at Her Majesty's pleasure, with the recommendation that once they died, they should be cryogenically frozen until such time as technology could revive them, whereupon they would each begin another life sentence.