at His/Her Majesty's pleasureBritish EnglishBrE lawSCL if someone is put in prison at His or Her Majesty’s pleasure, there is no fixed limit to the time they have to spend there 〔在押犯人〕没有固定的监禁期限;随国王/女王发落,随意在押 → at His/Her Majesty’s pleasure at pleasure(3)