Source : Webster's Revised Unabridged Dictionary (1913)

Doss \Doss\, n. [Etym. uncertain.]
   A place to sleep in; a bed; hence, sleep. [Slang]

Source : WordNet®

doss
     v : sleep in a convenient place; "You can crash here, though
         it's not very comfortable" [syn: {doss down}, {crash}]