[f. BUNK sb.1] intr. To sleep in a bunk; hence, to occupy rough sleeping quarters, camp out. Also, To bunk it. (colloq., chiefly U.S.)
1861. C. J. Andersson, Okavango River, xxvii. 317. They would not let us sleep in their huts; we had to bunk it out on the sand.
1884. J. G. Bourke, Snake-Dance Moquis, v. 53. My comrade and myself bunked together in the double bed.
1885. Pall Mall Gaz., 29 Aug., 6/1. The Orientals are a bunking people.