To share a room, bed, or other sleeping space with another person. You two will need to bunk together because we weren't able to reserve enough hotel rooms for everyone. I'll never forget the motley crew I bunked up together with at camp that summer.

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. We became best friends after we bunked up at camp.