DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Bunk \Bunk\, v. i. [imp. & p. p. Bunked; p. pr. & vb. n.
      Bunking.]
      To go to bed in a bunk; -- sometimes with in. [Colloq. U.S.]
      --Bartlett.
      [1913 Webster]