A makeshift bed refers to a temporary or improvised sleeping arrangement, often created using whatever materials are available on hand. Full definition
Some travellers had retired on Monday night on makeshift beds on the terminal's dusty floors. (theguardian.com)
These public benches may at times become makeshift beds for those experiencing homelessness; in such circumstances, we invite our friends and neighbors to enjoy the adjacent urban agriculture while they rest. (living-future.org)
I made a makeshift bed on a mattress on the floor next to his cot and when he woke up during the night would end up sleeping the rest of the night in there. (easybabylife.com)