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.

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.
See also:
  • bunk (up) with (someone)
  • bunk (up) together
  • bunk together
  • bunk up
  • sleep
  • rack
  • rack duty
  • rack time
  • sack rat
  • bunk down (for the night)
References in classic literature
A woman sat on a lower bunk with a cradle beside her.
Master and Man
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.
Chennai: Case registered against gang for attacking petrol bunk staff
My room gets no outside light, and the bed is an elevated bunk with a skateboard ladder going up to it.
New York broverload vacation
The astronauts slept in four sound-proofed bunks, with one member of each team sharing a bunk with one of the opposite team.
SHUTTLE DISASTER: THE INQUIRY BEGINS: LIFE ON BOARD