snooker clause
n.β Β«It is called a “snooker clause” in legislative parlanceβa last-minute insert into a dense and hurried midnight bill that, if ever disclosed after passage, always leaves legislators shocked, shocked at how such an undemocratic bit of mischief ever came to be.Β» ββSnookering the Taxpayers” New York Times Nov. 24, 2004. (source: Double-Tongued Dictionary)