bunk 1 
(bŭngk)
(bŭngk)n.
1. A narrow bed built like a shelf into or against a wall.
2. A bunk bed.
3. A place for sleeping.
v. bunked, bunk·ing, bunks
v.intr.
1.
a. To sleep in a bunk or bed.
b. To stay the night; sleep: bunk over at a friend's house.
2. To go to bed: bunked down early.
v.tr.
To provide with sleeping quarters.
[Perhaps short for BUNKER.]