boxcar bill
n.β Β«Often members of both partiesβ leadership introduce whatβs called “boxcar” billsβbills with general titles, like “tax changes”βthat contain no text. They are introduced just in case, at the end of a session, the bill file is needed for last-minute action.Β» ββRating the legislators: How we did it” Deseret Morning News (Salt Lake City, Utah) Mar. 26, 2006. (source: Double-Tongued Dictionary)