bunk with

bunk (up) with (someone)

To share a room, bed, or other sleeping space with another person. You will need to bunk up with your sister because we weren't able to reserve enough hotel rooms for everyone. They became my best friends after I bunked with them at camp.
See also: bunk
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

bunk (up) with someone

to share a bed, a bedroom, or a tent with someone. Are you going to bunk up with Fred? I'll bunk with Todd.
See also: bunk
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
See also:
References in classic literature ?
A woman sat on a lower bunk with a cradle beside her.
Summary: Chennai (Tamil Nadu) [India], July 16 (ANI): Chennai police has launched a hunt to nab a gang, which threatened and attacked staff at a petrol bunk with long knives on Sunday night.
My room gets no outside light, and the bed is an elevated bunk with a skateboard ladder going up to it.
The astronauts slept in four sound-proofed bunks, with one member of each team sharing a bunk with one of the opposite team.