cut and shut
n.— «Stretch limos, which can have up to 16 seats, are often imported from the US, where different safety laws apply. Some are adapted to become stretch limos by a process called “cut and shut,” where two vehicles are sliced in half and stretched by adding extra parts.» —“Concern over stretch limo safety” BBC News (United Kingdom) Nov. 27, 2008. (source: Double-Tongued Dictionary)